My wife works as a hairdresser and has fired her own clients with repeated success. This doesn’t mean she refuses people who come through the door or kicks people out randomly but if someone is too much of a pain and actually taking away time from clients who are happy and prepared to talk about how great my wife is (and who pay at the end) well, the choice is made pretty quickly.
Every business has the same number one priority – get clients in order to get money. However sometimes it’s a good idea to get the right clients in order to get money in the long term. If my wife needs to excuse to some of her clients about the behaviour of a minority then eliminate the minority.
Business is about choices.