Actually, Imo, using your pub analogy it's more like sitting in a booth and the people in the next booth are talking about Kylie Minogue and how much they love Kylie, you lean over the top and tell them you hate Kylie.
It goes further than that. It's like jumping in saying that Kylie is bad for you, it will make your brain melt, you don't like it really, you're only listening to keep your partner happy and it's the media who have forced you into thinking that you like it.
I completely agree that the thread needs a sticky to remind members that this is the sex thread, it might be explicit and if you don't like the subject matter, leave the thread! Also they should hide the topic if they don't like it.
There are trolls everywhere, but there are more genuine threads. If someone posts to ask some advice about trying anal sex, there is no need for anyone to post to say "ewww, that's disgusting", "he must be gay" etc. Comments that don't break the guidelines, but are just plain rude and unhelpful.
I think the posts on this thread ridiculing vanilla sex are just as bad tbh
No-one is ridiculing vanilla sex! People just want to enjoy their non-vanilla activities and discussion without being criticised.