The one I love is people who bag their dog waste and then leave the bag. Some toss it on the side of the trail, some try to hide it under fallen leaves, some stash it in the crooks of trees. The best one yet was when someone threw their bags onto the roof of the toilet building. We have a volunteer who walks the trail on Mackworth Island and picks up the litter who refers to looking for bagged dog poo as an "Easter egg hunt".

I'll stop now. As a park ranger, I deal with this kind of thing all the time and I could go on for pages and pages.