Derpy Hooves

The Pony Overall
Derpy Hooves, as you guessed it, is the second worst thing to have ever happened to the fan base. The first worst being poorly written popular gore fictions (or gore in general, leave that to the only joke Happy Tree Friends ever really uses). She's ranked above common stupidities of all fan-bases (i.e. useless humanized version of animal characters. Mary Sues passed off as fan characters who are only palette swaps of characters in the same media. And worst of all, non-canon shipping in general and the explicit art that follows.)

She is currently dead, and not to be brought back ever.

Her "Back Story"
If you think obsessing over a fictional pony that's well developed is bad, it still is. But to obsess over a background pony, without any background even is more depressing. Well sure this dumb pony has some background, or rather just a paper thin backdrop for a story.

It all begins with her being cross-eyed in the background, and that's it. This is what made the Derpy we know today. But let us assure you that a crappypasta based on Derpy will also be widely accepted as her backstory, as bronies will buy/eat anything as long as their pretty little ponies are at least mentioned, shown, or maimed.

Tho to be fair, she isn't a fan made pony. Just a pony who's entire life is fan made, must be a hard life if you're forced to live one you had no intention of living.

Her Rise to Popularity
Derpy has possibly been the most popular pony with ease, all cause of her lazy eye. If bronies had their hands on the little mare, she would be torn to shreds within a minute. (This is a common thing with with cartoons anyways, so it's all okay.) So popular that if she was pronounced dead, a massive brony suicide wave will occur shorty afterwards. Clearly after a grey pony dies there is nothing more worth living for, unless she comes back.

She has been "hired" as a mailmare, gets a daughter who is also in the show, a husband also in the show, a craving for muffins (along side other ponies, but they are others no one gives a shit about them), and more shit that is only there for her just cause of her eyes.

Really because of her eyes, it's no surprise it's the funniest thing ever. Just look at Slender, a game that solely relies on jump-scares to be deemed the scariest game ever. Cause startling and scary are now the same thing apparently.

Derpy (like Slenderman from Slender), has an opposite (for Slenderman, it's SCP-173. A being that poses an actual threat.) she's called Rainbow Dash, who's usually a victim to murder, sex, and providing meal. (If Rainbow Dash were in a Troma movie, her victimization to death, rape, and being eaten wouldn't be as shitty as almost all of the fan fictions she's in.)

Basically, good characters need to get the ax and background characters need all the glory. (Three words, Frank Grimes Jr. Look him up and watch his episode. Trust me it's better then reading this rant, and it's almost shows how I feel about this shit pony anyways.)

The Censorship
One of the BEST things to do to just about the WORST thing in the show has to be the censorship of Derpy Hooves.

It all starts when Applejack finally gets her second episode (Hooray!). Until... after the opening credits. Yup that's right, Derpy speaks OMFG!!! A TALKING HORSE IN A SHOW FILLED WITH TALKING HORSES!! THIS IS ALL SO NEW ALL SO.... WOW!!! And wow were bronies hipped up for this sin against cartoons. Like how they were hipped up for the sin against good story telling, known as A Canterlot Wedding.

As for the best thing to happen, parents (or just folks with good taste) complained about how Derpy may be an offense to the mentally handicapped. Hasbro (as far as I know) realize they went way too far with their fan service and redone the scene she talks in. Changing her voice, fixing her eyes, and removing her name but keeping the part that should of been changed all along for the issue, her persona. However because of this, she comes off more as a clumsy cutie rather then an annoying... ass. (If only her name was changed to Ditzy Doo, such a cute name but alas she is but a background pony. Of which should never be tagged or named.)

So no worries right? Derpy's censored, older folks are happy, and Pinkie's now the one who stole Applejack's second episode.

Until... Save Derpy 2012 happened. Cause there's no other pony more important then Derpy. Derpy is the most godlike pony in Equestria, Fuck Celestia Luna and that one pink wanna be. Derpy is the main character of the entire cartoon, if not every program on the hub. Thou shalt have no other ponies before Derpy. Thou shalt not kill Derpy. Derpy is the universe, Derpy is you, Derpy is life, ALL HAIL DERPY!

... Yeah some bad ideas are never meant to be invented.

Is Derpy Really Offensive?
Well you'll be surprised that the answer is indeed, yes. But if you're thinking she's offending the mentally handicapped, THAT much is still debatable. There's still the fact cartoon characters before her could just as easily be in the same case. (Or they just suffer from being kinda smart in one episode and an idiot the next,just look at Patrick Star, Timmy's dad, and Ed from Ed Edd n Eddy.)

Derpy is not offensive cause of her appearance or character, but more over her appearance.... If I could explain why.

This is a cartoon that went out it's way to pick up and succeed as the previous generation failed (for the most part). A cartoon that grew a fan base not because of the fan service, as there was none to give at it's rise to popularity. A cartoon that can make good stories and jokes, with a little twist here and there.

When it came to relying on the one thing fans wanted to see the most out of the show, it's as if they gave up. Like saying there was nothing better they can do but to put a character practically made up by fans and finally give her a voice.

It was almost if bronies could just run the show the way they want it to be as long as they pester the crew hard enough. If that were to happen: the show may as well had a TV-MA rating by the start of Season 3. Rainbow Dash would be dead, Fluttershy would become a newhalf, Pinkie will be murdering psychopath without a cause, Rarity would acquire a profession in prostitution and pornographic acting, Twilight would become Stocking throughout magic, and Applejack would no longer exist.

The censorship, while still showing Hasbro isn't the real top dog still, was at least a step in the right direction. As well as removing Derpy from absurd sightings in season 3. Although Hasbro doesn't need to have fan service as a placeholder for bad writing (Mare Do Well, Cutie Pox, and again A Canterlot Wedding) It's still better for them to do their own material rather then bring in material from the fans (Lesson Zero).

Final Verdict
Basically, Derpy isn't offensive for the reason you think. It's because the crew should of known better and could of done better. And wouldn't you know it? They actually have done better is season 3 (for the most part).

Although in contrast, the moment she became "canon" still isn't as bad as the blatant disappointment known as A Canterlot Wedding. Even then the whole Derpy craze still isn't the worst thing to come from bronies as stated at the top.

Derpy thankfully is dead and might not return, showing that the creators really don't need a single background pony to make a good episode... well... a good episode.

She didn't need to be killed off, just a name change to her original "Ditzy Doo" self and a visit to the eye doctor could of work wonders. That would of been the better choice from the start, keeping a background character IN the background.

To be eviscerated.

To be loved and grated reentry into Ponyville.