So I was inspired by Amy Krouse Rosenthal and John Green's videos on Positive pranking, and decided to trty it out myself. My sister and I went to Stop & Shop and bought a box of Hostess Ding-Dongs. Then, we attached notes to them, and "ding-dong ditched" some random strangers. That is, we put attached an explanatory note to the Ding-Dong, left it on their porch, rang the doorbell, and bolted.
That's a Ding-Dong with a note on it.
Overall, the whole thing made me really happy. I got to go around watching people discover food left on their front porch. I really hope they enjoyed the gift. It makes me feel good to think I might have made someone's day better. I mean, my day would certainly be better if I discovered someone had left a Ding-Dong on my porch.
The only annoyance was when people weren't home and didn't answer the door. We couldn't exactly leave chocolate covered food on their porch when it was a sunny day, so we had to go collect it and move on. We started only targeting houses that had garage door open, because it meant they were almost definitely home.
I strongly suggest trying a "Positive Prank" yourself.