Toi – I agree with you about it being scary. I am not sure hate is the issue. I don’t hate these predators, I just want them away from potential victims (and yes, I have tremendous anger that I have to learn to deal with).
We certainly need to leave the decision making to the qualified and trained people, but the discussion on this thread (I thought) was about how the rest of us were to respond. Do we invite him for lunch? Do we look the other way when we see a dangerous person heading to a school yard? Do we disregard the changes we notice in our neighbors kid that point to abuse? You are 100% correct that we cannot make takanas or paskin, but many of us are/can be responsible for letting victims be victimized when we could have helped them, or stepping in at the right time to prevent it.
The sad truth is that at this time there is no indication that child molesters ever recover. I think I heard that the truck driver who snuck into the chasidish camp this summer was actually already on the hormone decreasing chemicals.