[ame="http://www.youtube.com/watch?v=cyLrus1yKvI&feature=channel_page"]YouTube - PLATV: How To Hijack Fast Food Drive-Thru Frequencies[/ame]
Take crystal out of toaster/hair dryer/anything with heating element, put it in digital CB transmitter. Win.
I have a whole tray of those crystals at work. HEHEHE.... I also have the same radio they show at the start which can be software modded to transmit on all frequencies but cellphone.
It's a big myth the guy cooked up to get people to take apart toasters, I did a bit more research because I couldn't understand how it could work, and found the answer. It doesn't haha but I did solder a car lighter plug on my old cb set so I can fuck with truckers now