Well, these laws are an attempt to get around the belated realization that a five year sentence and release with minimal supervision wasn't dealing with the hazards these pervs represent to society. If New Jersey had mandated life sentences retroactively after these pervs were convicted, as opposed to a registry, SCOTUS would have overturned it - I guess SCOTUS was winking at this law, deciding that it was not an excessive burden on the invididual and therefore they were willing to overlook ex post facto considerations. But the states need to make some serious changes to sentences for these guys - mandate lifetime probation, treatment, and also a life sentence as an option - or, just let my wife have five mintues alone with them, that would work as well.
How abut we just stop giving these sickos special treatment? No more guards just for them, no more special cells just for them, just put them in general population. That will take care of the problem.