Some points about censoring fictional content there (censorship is a bad idea):

1) It might fuel someone's persecution complex. The idea of a dangerous world where people are out to get them. Feeds anxiety, alienation. It's happened a fair bit. It doesn't actually do anything positive.

2) Someone might see someone as an idiot or crazy (that's not wrong, lol). In any case, it poisons the well as someone is not seen to be credible or competent in these matters at all.

3) It violates someone's free expression. People have these things called rights, that's important.

4) Bad people don't need it. They can still do bad things. Good people are who'd suffer.

5) It violates the Constitution. Multiple constitutions.

6) Punishing someone because they resemble someone unpleasant isn't good. Also, due process still applies, in any case...

7) Can be a coping mechanism.