I have witnessed someone with their computer turn the radio volume up and down, start the wipers , shut them off - blink lights etc on someone else's truck. Some amazing things can be done if you know how to do it. This may have been a fluke, strange things happen sometimes.
Oh - can you believe that going thru a divorce x happened to buy an answering machine with the same PIN # as mine for getting messages and he was listening to all of my and daughters messages. Company said it occasionally can happen. You never know - I wouldn't have though to try my PIN on someone else's messages to see if it worked. Devious minds.