It already is implemented in America. Political dissidents are harassed by airport security, get their bank accounts closed and credit cards canceled, are banned from services like AirBNB, and get railroaded in the courts.
AirBnB seeks out and blocks people going to the American Renaissance conference https://gizmodo.com/airbnb-doesnt-want-extremists-on-its-pla...
Credit cards cancel payments to "hate" groups https://nypost.com/2017/08/16/credit-cards-are-clamping-down...
These are all political censorship against people or groups that aren't doing anything illegal, and the standards are applied differently based on ideology rather than any objective standard.
That's the one that bothers me, as there is hardly ant competition possible in the security checks business.
Airbnb, banks.. all it takes is some open minded provider to make those political police institution to loose ground. Although its matter a time before open minded providers also get pressured to police their customers.