I've seen people throw straw wrappers out of windows when they're at a drive-up window....and there's a garbage can just 5 feet ahead, waiting at the exit.
I used to go walking in a small park with a friend of mine, and you wouldn't believe the crap people just throw on the ground. Once, someone obviously gave someone else a gift (awww...how nice) because the paper, ribbon, box and styrofoam from whatever the gift was were strewn around.
When the school year started, several houses of student rentals had beer glasses and other crap on their front lawns for weeks. I called the police, but they wanted exact addresses, and obviously my "the first 4 or 5 houses on the street" didn't interest them, because the cups were still there. And I even saw some ($@#&$@ guys playing 'catch' in their front yard, with 2-3 cups within their reach, and a garbage can set out for pick-up, but they couldn't move their lazy @$$&$ to pick them up!