They're just used to literally anything being called "Child Porn" or "Pedophilia"
Anime, any sort of age gap in a relationship, NSFW art in general(because "children might see it!"), but not ddlg, because "it's not sexual, I swear"
So kids in bikinis is definitely going to raise a few eyebrows
...to be fair, it's /tv/ we're talking about here, so they're definitely not innocent or anything, but thinking it's some kind of conspiracy is beyond retarded. I tried explaining it to one of them, going into detail about 4plebs being an archive, /tv/ being full of shameless degenerates, and "/tv/ - television and film" literally being written at the top of the board, but their response was something to the tune of "Are you trying to convince me or yourself? You writing an essay here tells me all I need to know. Enjoy the show :^)"
Never try to explain anything to QTards, it's not worth the effort