I'm ticked off at people who smoke cigarettes in their car...and toss/flick butts out the windows (whether driving or not). Why can't they just leave them in their ashtrays and dump them in a trash can at the end of their day? I sometimes see them open their car door and toss the ashtray right out on the ground when a perfectly good trash can is only a few feet away.
This also goes for those who are eating say...pistachios...or peanuts and I see the shells fly out the car window also.
On a lighter note...no prize in the cereal box when there's supposed to be.