I did this at school back in the 90s in middle school. Pissed a few of the old women teachers off. We had a tv in almost every room in the corner and they were hard wired in for some reason. So they could not unplug it. It took them abut 2 weeks before they busted me. Fun times back then is all i can say.Back in the 80's when universal remotes were somewhat new my dad took one into his local watering hole and started messing with the TV behind the bar. Did it for several days. Had the bar tender losing her mind lol