Is targeting an option? As in
"traps cannot target players",

I tried it but it didn't work. But then again there are other things that need put in place before a rule will work. I saw a question about getting turrets to target players. So there must be something.

My intent is to stop players from draining other players turrets, but continue to allow them to target NPCs.

Edit: Never mind. I just needed to read the damn page. Carry on.