From El Reg:
A Polish teenager allegedly turned the tram system in the city of Lodz into his own personal train set, triggering chaos and derailing four vehicles in the process. Twelve people were injured in one of the incidents.
The 14-year-old modified a TV remote control so that it could be used to change track points, The Telegraph reports.
"He studied the trams and the tracks for a long time and then built a device that looked like a TV remote control and used it to manoeuvre the trams and the tracks," said Miroslaw Micor, a spokesman for Lodz police.Roll on IBC...
Polish teen derails tram after hacking train network | The Register