As despicable as this crime is, there should be no abridgement of our legal protections under the Constitution and Common Law.
This will appear before SCOTUS again when a convicted sex offender. who has completed his sentence, refuses to register. The Court will have to go beyond Smith v Doe and ask if sanctions against refusers are an example of enforcing an ex post facto law.
It seems more than a little crazy to me as well, though I'm anything but a legal expert.