The problem isn't just that random pervs are latching on to the work LGB people have done to gain acceptance, the problem is also coming from within our own demographics. LGB people need to find it in ourselves to tell these people to fuck off and that they do not represent our beliefs at large nor our interests. Maybe even go as far as to protest their speaking on our behalf

Completely, completely agree. And I think it starts with making it clear what sexual orientation IS and is not, and dropping the TQ+. There are four possible configurations of sexual orientation: homosexual (attraction to same sex only), bisexual (attraction to both sexes only), heterosexual (attraction to opposite sex only), and asexual (no attraction to either sex). But I do think that cases like these occur not just in the context of Queer Theory but regardless within our own demographics, as you say... I'm reminded of (at least one?) gay rights movement leader who tried to blend the same-sex rights movement with a p*dophilic one.