[sametmax]

Sure, but no matter how much you do this additional focus, there will be always be a few terrible persons going through the net. The only way to avoid it would be to cut down on freedom to an extreme.

It's also very expensive. The legal system, prisons, and the whole gov web is a big, slow and inflexible machine.

Removing the incentive to be an asshole is just better. But it's our job, not the job of some higher power.