I actually worked in one of the most expensive hotels in London. If people were assholes to the staff or broke any of the hotel rules (which were extremely lax

I actually worked in one of the most expensive hotels in London. If people were assholes to the staff or broke any of the hotel rules (which were extremely lax WRT prostitution etc.), they would be marked in the system as a "5 star guest". Any time in the future they tried to book a room, the hotel would simply tell them they had no availability.