Someone pushes you with a crowbar and it deals no damage but you still decide to shoot them.

2.6 Valid KOS Reasons
There are many KOS reasons and they all work in different situations and scenarios, here are a few:

- Holding/Using a Traitor only weapon without announcing that he got it from a traitor.
- Ignoring unidentified bodies/C4 etc.
- Declaring invalid KOS on other players.
- Turning themselves in i.e. "I'm a traitor, in the traitor room" etc.
- Seeing a player inside of a Traitor only room.
- Failure to answer to a life check.
- Throwing a incendiary/discombobulator grenade near the player.
- Pushing someone with a crowbar near an edge or hazard.
- Attempting to obstruct the Golden block from reaching the tester.
- Attempting to obstruct diamond cubes from reaching the furnace.
- Destroying a health station without permission via text chat