@ThugHeaven
Necromancer using dark magic to animate the corpses of villagers killed in a disaster to dig out and rescue other villagers... while the paladin watches. Cue two hour long discussion on if this was still evil.
At a local con one year (Origins, not small nut gigantic) some vampire LARPers starting jumping up and down in an elevator belonging to a historic hotel and jammed it.
It's not an amazing story, but is the worst I have. Mostly, LARPs are just eh. Boffer LARPs doubly so.