onBotDamaged -> Bot -> InstantRespawn
If I were making an invisible murdering machine, I would change that line to
onBotDamaged -> Bot -> AddHealth 1000
Anyway, albeit true that's a bit abusable..
1. Can't hurt anybody outside of a minigame (unless you straight up kill them on impact)
2. Can't crash the server, so all an admin has to do is wand the brick and / or ban the player
3. Admin menu -> ClearBricks
An example of truely abusable would be the crashing servers with 2 lines of events.