This particular experiment was definitely not planned, but we enjoyed it, and entertained a large crowd at the same time, without hurting anybody.
While in college, my boyfriend and I were at brunch one Sunday in the main dining hall, rehashing the previous night's formal, in particular, we were discussing the couple who left the room, only to have a loud argument beneath the open windows of said room. They frequently had blow-up fights in public, and we wondered if perhaps they got a thrill out of it. So, in the middle of brunch, I scream "I can't believe you slept with her!" Dear BF picks up the cue and goes with it. "I wouldn't have if you hadn't left early!" We went on and on for 20 minutes. People started to crowd around us. They took pictures, called their friends to come see the drama. They reacted to our fight "Hit him!" "Ooh, I can't believe you let her say that to you!" "Go on, Girl!" We left the hall screaming, and people seriously followed us outside. I ran across the quad into the dorm, and when we shut the door behind us, people booed.
I figured people would stare and point, but their participation amazed me. Even snobby college students enjoy a good fight, apparently.