I collected stories from a few international villains. After hearing most of them, I concluded two things. First, that I didn't want to talk about law enforcement in other countries, because I clearly don't have enough information to give sound advice. Second, American villains are lucky sons of bitches.
Let's run down a few of the alternatives.
In eastern Europe, a group of powerful heroes found a way around the Hashmal process. Rather than trying to hurt their villains to death and risk empowering them further, they pitched them into abandoned salt mines and sealed them away under thousands of tons of material. This didn't directly injure the villains - physically - but those guys are essentially trapped in living tombs miles under the earth. That's just mean, man.
Some villains (and for that matter, some heroes and unaligned civilian supers) are put to work as living engines or tools - those with heat or electrical powers are chained into devices which can harness their output, for example. There's a few heroes who have chosen to walk away from Omelas and criticize this practice, but for the most part, nobody cares - villains are villains, right?
Depowerment and execution
Power-suppression drugs aren't just used in America, or for making it safe to jail a super. In some places, they're used as a prelude to execution of villains. The worst part is that the bodies of the condemned are then handed over to scientists and researchers for experimentation.