Rubrick on one of her alts yesterday was attacked twice by a high level undead hunter using only his snake trap. She was not flagged and was killed once, and attacked a second time, but bubbled and ran like hell. Is there a glitch with the trap that allows it to be used to attack the opposite faction when they are not flagged?

A Google search for "snake trap flagged" reveals lots of posts about snake traps killing unflagged players.