They have the courts, police, and all the legitimacy that comes from being the state - the entity that is authorized to use force of violence to impose its will. All sort of unpopular laws are passed and enforced, this is just one more.
This might be a part of the problem. I thought that states weren't allowed to keep this background check information. They do anyway and then they're surprised when citizens balk at their new ideas and promises about not misusing this information.
I don't care what any lying government tells me:
REGISTRATION DOES/WILL LEAD TO CONFISCATION.
1) They perceive themselves a a ruling class, not representatives of the electorate and
2) Minor bureaucrats have run amuck in our system just like in the former?? Soviet Union. Power corrupts.