@kingaron
I don't participate in the incessant and insufferable FBI babbling, so I might be wrong, but I expect it's a mix of a few things.
There are some to whom it's just a joke, but who have failed to realize just how dead the horse they're beating is.
There are some people who are uncomfortable with their own attraction and use the FBI meme to put on airs that they only read it "ironically" and that there's no way they'd
actually like that gross stuff, h-haha.
There are some who are genuinely dumb enough to think loli manga should be illegal.
And I suppose there are probably a few who use the meme as a way to vent their frustration that in many places those dumb people mentioned above were the ones who wrote the laws. The FBI itself may not care, but it works as a meme better than RCMP or whatever Australia has, and those agencies actually DO ruin lives over this shit; that whole idea, that fiction and objective reality are legally declared the same and you can go to jail for imaginary crimes, is such an absurd mockery of justice that to many people the only response is to laugh away the disgust.