Wi-Fi device detection

This is no different than the peeping tom cameras placed in homes by landlords. He reversed the roles.

If the camera/device has a microphone along with video, that is a HUGE no-no as the privacy violation is huge. Video only, not so servere, video with audio... really bad in most cases. I velieve, even in a one party notification state, this is an exception because he isn't present when the recording/action is occurring. Hopefully you and the law can hammer him. Get screenshots of the network name, etc. Shows the intent of his actions.