I don't think they're trolling.
I think they actually like that stuff as he seems quite genuine in asking where to find it; trolling would be if he actually posted said gross stuff he's looking for for no appreat reason than to gross people out.
There is a lot of disgusting fetish CC stuff for sims 4, so what better place to WCIF than here.
But I'm not going to speak on the matter more as their fetishes are their own...even if I do find them highly disrupting and disgusting.
You don't post stuff to bother people willy nilly or you'll just get banned. The way he's doing it you can't do anything about it because "it's just a fetish", which I don't think it is, but regardless, didn't he already post some image before to "illustrate" what he meant? I think I vaguely remember something.
There are probably better, more niche places to WCIF for very specific fetishes, which is what he's
supposedly asking for. He appeared exactly at the same time as that absurd influx of new members posting smooth brain low effort requests for ridiculous stuff. They all came from the same place and it was likely done on purpose. Do you understand what I'm trying to say?

It's moronic so if we treat it like it is and ignore, maybe he'll fuck off somewhere else like most of them did.