However, if not illegal where the bathroom happens to be, the owner could still potentially get sued over it. This is for the general public. Law enforcement could put a camera there if they could show it was germane to their investigation, like trying to catch a drug mule, and need to see them on the toilet, that kind of thing. read more
Private businesses typically can have security cameras installed where customers and employees have no reasonable expectation of privacy and there is a legitimate business purpose — typically to prevent theft or vandalism. read more