The guy you mention in #1 sounds like a dude who used to live in a condo complex I managed. He would send emails complaining that a specific neighbor hadn't picked up after her dog, accompanied with a video clip from his doorbell that...showed her picking up after the dog. He and his mother were apparently the self-designated dog poop police and the board had to contact the owner of his unit to be like "you need to tell your tenant to knock it the fuck off"