I noticed that a hotel I stayed at reworded their door signs to say “cleaning not required,” which seemed to me a sensible way to reframe expectations. Legal o

I noticed that a hotel I stayed at reworded their door signs to say “cleaning not required,” which seemed to me a sensible way to reframe expectations. Legal obligations aside, how would a provider of public accommodation figure out who to refuse the business to? Do they size up guests at checkin to see if they look hacker-ish? Is that more fair than a bumbling effort at deterrence by advertising your existing security policy, of casting eyes in every room every day—a policy you apply uniformly to every member of the public who wants to rent a room?