Not too long ago, I had some guy parked in front of my house eating his lunch. Typical fast food stuff. When he was done he just opened up his door and dropped the whole bag on the ground, then got out of his truck and walked down the street. I was so pi$$ed, I grabbed all the stuff he dumped and put it right back in his truck. (he made the mistake of leaving it open) I thought about it for awhile and decided that wasn't enough punishment. I keep a small kitchen sized garbage can out in my side yard to collect all the dog poo in. I figured it was time to dump it. What a perfect opertunity! As luck would have it, the truck had a camper shell on it and it was open too. The guy had a sleeping bag in there. I gave him a new "fragrant" 40lb. pillow. I'm sure it was a few days before he discovered it.
I have never seen that truck in my neighborhood again.