Also there have been cases where criminals "copy" your license plate from these such forums and other web sites. Then drive around with your license plate running bills up for speeding, parking, tolls, etc... Then you have to explain this to the police and you have NO proof!! This can lead to thousands of dollars, pounds, euros for you the innocent driver, and all you did was put your car photo on the "WORLD WIDE WEB".
Food for thought !!