classifying something as a mental illness is a loooong way from saying its not problem. Much like I think people hooked on crack need medical help, not prison time, I think pedos need many years of therapy and perhaps voluntary chemical castration if thats what it takes to keep them from becoming criminals. With our current "kill on sight" view, I just don't see a lot of these people seeking help. As a result, you'll see a lot of abuse happening when they finally flip out.
There are two ways you can approach any problem. Like an idoit, and like a reasoning human.