It's not as if the movie is widely popular to begin with, but the only reason it has what little recognition it does is because of the name Lesbian Vampire Killers. A christening like that comes with a certain set of expectations and a certain built in demographic, to call it just Vampire Killers is to retroactively neuter the very reason it exists in the first place. I understand the logic behind this re-title less than I understand how to forge the phallic-shaped handle of the sword used to kill the she-vamps in the movie. It's just the DVD release, for crying out loud.
While I wouldn't have agreed with it, I at least would understand the motivation if this was a theatrical release, as there is always an uptight group somewhere ready to protest a film's release no matter how futile it is. But there is going to be no groundswell of picket lines outside of Best Buy store fronts, and if Walmart can carry "The L Word", they can sure carry L-Word Vampire Killers. I'm no DVDologist, but I guarantee that the Weinstein's would sell more copies of a movie called Lesbian Vampire Killers than they would Vampire Killers, so considering how hurt they are for income these days, this move makes even less sense. They can put a travesty like Halloween 2 back into theaters, but they can't stand behind the word lesbian? Real morally consistent studio ya' got there, fellas.