techfutures:

SQL INJECTION FOOLS SPEED TRAPS AND CLEARS YOUR RECORD

Typical speed camera traps have built-in OCR software that is used to recognize license plates. A clever hacker decided to see if he could defeat the system by using SQL Injection…

The basic premise of this hack is that the hacker has created a simple SQL statement which will hopefully cause the database to delete any record of his license plate. Or so he (she?) hopes. Talk about getting off scot-free!

http://hackaday.com/2014/04/04/sql-injection-fools-speed-traps-and-clears-your-record/