For all your stories of small victories over those who've wronged you.
This happened a few years ago when I was flying to Canada for a trip.
Mid way through the flight, I was awaken by the person behind kicking my seat. I thought it was a kid, so I ignored it. After a few minutes of non-stop kicking, I turned around and saw that it was a guy in his mid twenties. I asked him politely to stop and could hear him and his friends snickering, saying something in a language I did not understand. He stopped for a moment but restarted.
So I took my water bottle and slowly emptied half of it on top of his backpack that was under my seat. I heard him freak out when we landed and it was satisfying af.