Madison V Marbury
Some folks just do not believe courts overrule the legislature.
If the court was going to act they would have in Alaska DOC V Doe.
The Rehnquist court decided via Mr. Roberts persuaded the bench that, ” Registration itself imposed “no affirmative disability or restraint upon plain liberty.”
That court also acknowledged the ” ex post” wording of the law thereby justifying their opportunity ( jurisdiction) and review. The regime contained FIRST in FED OMNIBUS5533( 1994) THEN adopted by states SECOND (WI Act 10;1995) under threat of Byrne Grant withholding.
Running to the FED is costly so for the average registrant state courts are the best approach. IMHO