Take a look at Elaborate televised prank on Belgium's terrible phone company - Boing Boing
Basically, the phone system is Belgium (run by Mobistar) is pretty bad. Some pranksters placed a huge container blocking Mobistar's parking lot. There was a Customer Service number on the container, which went to the pranksters (who were hidden inside). When Mobistar called to complain, they were hit with transferred calls, being put on hold and then cut off.