Anarchists in general are quite negative to the prison system and often believes in alternatives, or at the very least tries to come up with alternatives (hard as that might be).

That being said, there are certainly situations where people with anarchism (or anarchism-like) beliefs have essentially jailed people. For example YPG/YPJ forces in Rojava certainly took IS/ISIL forces they won over as prisoners.

PS: Never ever heard of an anarchist that thinks the US prison system is anywhere near of justifying itself though, but that's probably something all radical leftists agree on.

> Never ever heard of an anarchist that thinks the US prison system is anywhere near of justifying itself though, but that's probably something all radical leftists agree on.

I don't think you have to even be left of the centre to realize the US jail system had serious flaws and need major reforms.

Just looking at the incarceration rates and the number of reoffences compared to international levels show that something is completely off.

> I think lots of anarchists are perfectly fine with putting some people in jail.

Huh, that's not what I've heard. Anarchists I've seen talking are very strictly against explicit hierarchies, and prison obviously is very much that, since bare minimum you have prisoners at the bottom of the hierarchy there.

That's sophomoric rhetoric. In USA Hierarchy is justified by the Declaration of Independence and the Constitution. That's not enough to satisfy anarchists.