"I suppose that's done intentionally, to squick people with a metaphor of violation"

I guess, but the only violation here is their refusal to keep their obsession with other people's sex acts to themselves. Hell, I don't think most people think about their own sex lives as much as these people think about what other people are doing!

"I don't see any reason why either Christians or non-Christians should give any 'benefit of the doubt' to fake Christians, when Jesus himself said that he sure wasn't going to."

I guess it comes under "judge not", but then so does "stop obsessing over the gays!", so I don't know how they rationalize it to themselves. It's not very likely that there is an afterlife (or that if there is, that any one of us is right about what it entails), but if there was such a thing it would certainly be funny, in a schadenfreudy way, to listen to them all get chewed up and spewed out for being raging hypocrites and jerks.

*thinks* of course, that only applies to those Christians who are hypocrites and/or jerks, which ought to go without saying, but just in case.