When /r/anarchism (left leaning sub about anarchism, antifa, communism, ...) mods refused to enforce reddit's rules relating to the incitement to violence, reddit only removed the mods in question instead of closing the sub.

When /r/physical_removal (right leaning sub about pinochet 'memes') mods refused to enforce reddit's rules relating to the incitement to violence, the sub was removed.

When /r/nazi (third position leaning sub about national socialism) - well, I don't actually know whether the mods there refused to enforce reddit's rules. It's been removed.