The Phone Losers of America web site champions pranks of all kinds, especially ones associated with technology. One of their standard pranks is taking over the radio communication system used at the drive-up window of fast-food restaurants.
They really out did themselves by creating a video that describes how to mod a CB radio to work on fast food restaurant frequencies. (Hmm, it seems unlikely that a 27 MHz transceiver could be easily modified for VHF.) Oh, I see, they use a special crystal found in modern day toasters. That explains it.
Warning: some adult language
Be sure to look at the comments on the video. The prank keeps on going.
I do not condone nor support modifying radios for out-of-band operation, hassling employees of fast food restaurants or posting hilarious videos on youtube.com
73, Bob K0NR