Scammers have been using fake parking tickets to get people to visit malicious websites.

http://www.darkreading.com/security/...leID=213300709

Cybercriminals took their malware to the streets in Grand Forks, N.D., where some motorists recently found parking violation notices on their windshields instructing them to visit a URL to view photos of their purported infraction. The phony parking tickets contained a malicious URL that requires them to download a toolbar, which is actually a Trojan.
The "toolbar" shows photos of parked cars in the area; the user is prompted with a pop-up with a fake security alert, attempting to lure the victim into installing phony antivirus software to clean up their machine.
That's a new one on me, although the malicious website and trojan bit is old hat.