> the owners aren't in the business of listening in on their customer's conversations and picking fights with them. Customers can complain about other customer

> the owners aren't in the business of listening in on their customer's conversations and picking fights with them. Customers can complain about other customers to waiters and restaurant owners. That can happen in person, in reviews, or on customers' blog articles (you know, like the articles they post on Substack, if Substack lets them). "I overheard that other customer saying that waiters get paid too much." "4 stars. I'm reluctant to keep going to the restaurant though, because the waiters do nothing about loud customers." "That restaurant doesn't kick out people wearing Nazi symbols. Boycott it." A customer's suggestions can be unreasonable. The owner can ignore (un)reasonable suggestions. The waiter can ignore (un)reasonable suggestions and decide not to let the owner know about them. But kicking out a customer on the basis of customer complaints isn't necessarily less valid than kicking out a customer who hasn't attracted complaints from other customers or letting a customer who has attracted complaints stay.