Yea, obviously vigilante justice comes with issues.

With prison abolition, its not necessarily against 'separating someone from society'.

But that's... Imprisoning them? If we trap abusers in a place they can't leave, that's a prison.

prison itself is a threat for more violence to victims in many cases (for example, vigilante justice against your rapist will send you there to be further raped).

Yes, and I don't want such people sent to prison. Or speeders, or drug "crimes" or probably other things. But I still think we need to remove people from others, and I suppose a prison is less severe then just killing 'em.

If it were a fairly normal community, except it is separated from society, that is far more acceptable I think.

But you do need to make sure they can't leave, physically. How would that not be a prison? I mean we could improve on our current prisons a lot, and should. But when I start imagining how you would actually, physically keep potentially dangerous people away from society...

Also I just don't think child abusers deserve that.