artoftheprank.com
Hacking Drive Thru Speakers - The Art of the Prank
Update June 27, 2008 from Brad Carter: Looks like someone put the below instructional to good use and drove the employees and manager of a Burger King nuts: Burger King Drive Thru Takeover via fitzmxr Submitted by Brad Carter from Phone Losers of America, March 30, 2008: Here's a video that shows you how to