This is pretty much what I'm talking about when I refer to "lib-trolls" that is to say people who use a version of the liberal agenda to spread chaos and get attention, without any real issue being at stake (which they know). The basic idea is you can drop an "ist" or an "ism" about anything in certain forums, especially gaming ones which tend to be vocally left wing, and get tons of people rallying against whatever you say simply because of the accusation, there being a fear that refusing to get involved or saying "hey wait, this isn't an issue, it's stupid" will get the objector labeled. The Troll who starts it can sit back and watch the chaos unfold for many lulz, especially if some people object.
It's becoming a bigger issue in recent months because a lot of people, including genuine liberals are beginning to catch on, and your seeing more in the way of genuine opposition to the trend.
It should also be noted that this can, and is, done in reverse. You do have people who troll the same way using conservative issues in the right forums, when there really isn't any kind of issue, even by hardcore right wing standards, but pretending there is one and getting attention can again generate lulz due to the rallying effect.
I will lose a lot of respect for BL and Gearbox if the writer actually DOES relent and change this for these reasons, as this is exactly the kind of situation where people need to stick to their guns no matter how many objections they seem to be. Backing down here, or in cases like the "Hitman Absolution" trailer, and similar things, just encourages trolls to continue pushing and trying to make issues out of nothing.
To be honest you can tell it's trolling because of all the uncouth crap in Borderlands they actually pick one of the least offensive bits to single out. Between characters like Hammerlock and Handsome Jack (Butt Stallion, etc...) left wingers could be rallied to cries of homophobia, not to mention sexism especially if you consider what Scooter says about his mom (and who it is) between BL 1 and BL 2. Of course if the "Tiny Tina" thing succeeds, you can pretty much assume any one of a thousand other things will be picked on, because at it's core Borderlands is exactly the opposite of trying to be "Politically Correct", indeed one could argue it's 100% offensive and irreverant towards pretty much everything and everyone, played up for humor. Nothing is sacred to Borderlands, and that's kind of the point.
Otherwise, understand "wiggers" have been around for decades now, starting to seriously appear in the 1990s. This is to say white people who adopt manners of dress, lingo, etc... from black criminal counter-culture and try and hang out with that crowd. The fact that's it's genuine, as opposed to something similar to "Black Face" is why it's garnered so much attention for so long.
To be honest the serious dialogue that it's generated has had less to do with racism in the "whites hate blacks" thing but on black superiority (since there is a tendency to not accept people who do this), as well as the negative influance black culture has had on society. The appeal of this kind of thing being that blacks being a protected minority get away with doing, saying, and acting in a way that would get someone who isn't black in a lot of trouble. Kids being trouble makers by their nature started idealizing this kind of thing for that reason and taking the attitude that "if I do the same thing, and claim the same reasons behind it, I too can get away with it". Something that has met with mixed results.
This kind of thing is exactly why you've had guys like Bill Cosby, who has a PHD in Children's Education in addition to being an actor and comedian, going off about the effects of black counter culture on society in general, as well as specifically to black youth. Something that applies heavily to schools and such which is part of his area of expertise. Showing how such a "sacred cow" mentality has basically created both blocks to the progression of, and assimilation into the mainstream of black america, but also leaked into other aspects of society, encouraging increasingly anti-social behavior and a scorn of things like education in favor of crime and using a counter-culture to justify not fitting into and working within society.
The point of the above rant is that whether you like it or not, there are 13 year old whites, of both genders, who act EXACTLY like Tiny Tina does. It exists, and isn't exactly uncommon, so it's not like Borderlands using it, and making fun of it in it's own way (like it mocks everything) is noteworthy.
This writer, and those following this discussion/issue should remember the first rule of the internets, or what SHOULD be the first rule... "Don't Feed The Trolls".