> I dont know why people would want to be in a community where they arent wanted.

This is standard predatory behavior. Child abusers hanging out with kids, weirdos hanging out near the women's clothing department, etc.

It's usually a clear indication of the sort of people you don't want to associate with in your online community. They bring a net negative to the table.

What is "it"? Putting the two halves together, the sort of people who want to be in a community where they aren't wanted are the sort of people you don't want in that community. I guess I can't argue with that.

They are talking about social norms. Inversely, "creepers".

Most adults understand why men should not, generally, be hanging out in the women's clothing department. When accidental violations of those norms are pointed out, they apologize and correct. Creepers, OTOH, gonna creep.

For their own well-being, online communities should police repeated violation of social norms. Otherwise the normals leave and creepers take over.

I spose. But labelling deviants (from the norm) and chasing them away is hazardous, because if you overdo it you end up with an echo chamber. How dare you talk to the people who others don't talk to, you traitor! Now you have to be ostracized too ... is how it might go.

(I can't help thinking of the Father Ted Christmas special, where a group of priests have to organize a quasi-military operation in order to escape from Ireland's largest lingerie department without a scandal.)