No, you should not be allowed as a business to deny entry, or deny service, or deny product to a person/entity you do not "like" or a person who is associated w

No, you should not be allowed as a business to deny entry, or deny service, or deny product to a person/entity you do not "like" or a person who is associated with someone/entity you do not "like". If you removed a person from your business because of something they did, then denying them subsequent business is an extreme measure and will most likely not hold unless there is language in laws that you can use, like violent activity, criminal behavior, etc.