One quasi-conspiracy I sometimes entertain is the idea that the modern obsession with LGB(T) 'rights' and 'respect' has far less to do with LGB people, and far more to do with heterosexual people.
Basically, I suspect LGB people are at least sometimes used as a proxy for justifying some heterosexual's own sexual hangups and proclivities. When a heterosexual says 'whatever happens between two consenting adults is okay!', they're not taking a stand for LGB sexual activity alone, but for pretty well everything under the consenting, adult sun. I do not think this is always accidental.
(T is edited out here because, for as often as I talk about LGBT footsoldiers, really - the T's are off in their own territory as near as I can tell. Tumblr may scream and shout, but too many people, including LGB, tell me in confidence that while they may all onboard with gay marriage or this and that, those T's are, in their opinion, pretty damn crazy more often than not.)