Trendhunter magazine discusses a new series of gadgets dubbed "annoyancetech" . Gadgets that stop others annoying you.
"A slew of gadgets have been invented recently with a range of social applications, from a jacket that zaps gropers on the subway to a harmless device that gets dogs to stop barking, to the Xcuse box, a contraption that produces background noise for phone conversations to let you fool other about your actual whereabouts."
Blaring television sets in public places annoy me. Do they have anything for that? (The article describes one such device- but it is not clear whether it can change channels or completely shut it down.)