I agree with rookie. Sexual predation is seldom a one and done deal. However, we need to look at the definition of a sexual predator.
I think there is no disputing that rape, sexual molestation, and sexual assault on anyone qualifies.
Pissing in an alleyway, having a 17-yr-old banging his 16-yr-old SO, and other such trivial shit? Not so much. Society, in many cases, focuses too damned much on the punishment, and not the rehab. So, the rehab element is something to look into, so long as it doesn't wind up like a Clockwork Orange scenario.