What? IR remote controls have never needed to be paired.
Yeah, but you actually have to plan ahead to be a jerk with that stuff.These types of things have been available for years. One of my friends had a little thing on his keychain that would send the "off" command for the most popular ~50 televisions several years ago. Here's something like it at Thinkgeek:
Ninja Remote Stealth Television Gadget and IR Jammer