I never realized that by owning a yellow 914 I would be the trigger of such violence !
http://www.deathgob.com/yellowCar.cfm
Although the 914 isn't the top scorer. Apparently if a yellow mini is spotted it is the double whammy according to some of the other web sites.
Then there's the fascination with yellow car crashes...
http://www.car-accidents.com/yellow-car-crashes.html
Or if your really bored, the yellow car parking lot game...
http://www.i-am-bored.com/bored_link.cfm?link_id=5402