I have not seen such a mechanism, nor do I feel there should be. Strikes me as a waste of time -- either they can live with their decisions -- and we, as persons who agree to do so when we sign up, can do the same obviously, or we would not be signing up -- or they cannot. They want visits. If they cross the line enough, enough people will not do so, and they will change. This is much like how it was in the days of mining towns -- miners had to die, and it was ultimately court rulings that decided the outcome, not the occasional irate miner's revolt.