RTFA: http://news.bbc.co.uk/2/hi/technology/7872299.stm

Hackers have discovered a new way of duping users onto fraudulent websites: fake parking tickets.

Cars in the US had traffic violation tickets placed on the windscreen, which then directed users to a website.

The website claimed to have photos of the alleged parking violation, but then tricks users into downloading a virus.

Anti-virus firm McAfee says the Vundo Trojan then gets users to install a fake anti-virus scanner.

Vehicles in Grand Forks, North Dakota were the targets for this new type of fraud.

Drivers found the following message on the yellow ticket on their windscreen: “PARKING VIOLATION This vehicle is in violation of standard parking regulations”.