It's certainly an issue. But I think some people are a little naive about what could be fodder for fetishists. There's not much here that wouldn't appeal to someone. It goes way beyond pants and bodily fluids.
A thread like this for example, filled with people talking about how disgusting and shameful and pathetic sexual trolls are...this will be a goldmine for a certain kind of person.
The threads where someone posts details of their sex life and a lot of people get pearl-clutchy...the latter will do just as much for some people as the former. In fact a lot of them are very clearly designed to get that exact negative reaction.
The threads where everyone piles on an OP's DH, saying how useless and spineless and totally shit he is...again, total wank fodder for people who get off on shame. Honestly AIBU in general is ideal for that. Post something where you're clearly in the wrong, and watch the well-crafted verbal humiliation roll in.
A lot of the threads about weight and food contain a ton of material for fat fetishists, feeders etc. Some of the 'can I fit in this ride/airplane seat' threads barely even pretend otherwise.
It's in the most spectacularly benign threads too. I've seen some painfully dull washing up bowl threads that at second glance were obviously designed to get people talking about rubber gloves.
It's seriously everywhere. Take away everything someone will get off on and you won't have much of a website left.