Censorship and Discrimination on Amazon

So apparently Amazon has this new policy toward "adult" material which excludes certain books from their online searches and rankings. To me, that much is annoying in and of itself, but embedded in this policy also appears to be a certain hetero-normative bias which classifies many books with GBLT concerns, from classic literature to anthropological study, as "adult" while books containing explicit heterosexual material are left untouched. If you are as upset about this as I am, check out this petition (which has more information on exactly what kinds of books are being censored) and if you feel so moved, sign it.