USA Cheer/USASF does not even bother to enforce the restriction. There was an individual on the banned list that competed at NCA College Nationals last year. It was ignored by both the college and Varsity when first reported, and it finally took enough people to say something. To the best of my knowledge the only action taken was to remove that college's name off the results list, delete the videos from Varsitytv, and not allow the individual to enter the partner stunt competition.
@catlady to respond to some of your comments about why law enforcement wasn't called, this is a prime example of what many of us encounter. This person had already been arrested and convicted. He wasn't actively committing a crime, but he was not eligible to compete, coach or have any involvement yet Varsity/USA Cheer did nothing to prevent it.