For some reason I started thinking about what the meanest thing I've ever done was, and it was kind of hard to remember anything terribly bad. It seemed to not go much farther than random vandalism, pranks, and making a few people cry. There's gotta be something worse that I've done though, but maybe I just need to change my way of thinking...
So let's hear it. What's the worst (meanest, most inconsiderate, etc.) thing you've ever done to someone(s) or something(s)? Spill your guts.