One summer, while I was in high school, my friends and I drank an average of two 2L bottles of Diet Pepsi a day. We would store them in a large wooden clubhouse my parents built in the back yard. Eventually the clubhouse became two full of bottles to open the door so we started throwing the bottles in the window.
One evening my friend Jon and I decided we would remove the seats from his families mini van and transfer the bottles from the clubhouse to the the van. We, of course, removed all the “Pepsi Points” from each bottle. Those things could get you stuff! 
In the dark of night we drove the van to one of our teachers houses, strangely we chose a teacher who’s classes we genuinely enjoyed, pulled up onto his lawn, opened the back of the van, and raced away.
That’s how we had our first “two litering.” It’s like toilet papering but costs ten times as much and I’m sure will have a horrible health effects on the person pulling the prank.
Hundreds of bottles earned me a t-shirt and a hacky sack that I didn’t know what to do with. ↩