I know kids are getting killed in school restrooms but this is just beyond weird! Like zippyt says, WHO keeps these tapes or monitors the activity?

If the purpose is to PREVENT assaults, drug deals, or sexual activity, just TELL the kids there are cameras and have them prominently positioned. Then anybody who is up to dubious behavior will avoid the place and nobody's privacy or civil rights will be violated.
Sometimes I think that our schools are run by people who are so twisted that they are the ones who need psychological counseling rather than the kids.