Criminals in Johannesburg are raiding the city's traffic signals for the SIM chips that allow them to be monitored and reprogrammed using the phone network; the SIMs can be inserted into regular phones to make free, anonymous calls. T
The components were ripped out by the criminals from the traffic lights and used to make unlimited calls that have cost JRA a lot of money…
In early December 2010 there were also reports of thieves removing traffic light poles to sell them for scrap metal.
(via Schneier)
(Image: Commissioner Street, a Creative Commons Attribution (2.0) image from mister-e's photostream)