You already cannot give cabal items. You have to drop them. If you make it no drop, then the guy with the killing blow is kinda hosed, as it makes it so you can't recall/teleport (obv villagers don't care about this feature when they raid and may take advantage when raided).

If no drop, it makes it so air shifters/lowbies can't run it (not opposed to this). Also makes it super dangerousif you're getting hunted and can't drop/recall.

Not sure if no drop, the items gets made so you can teleport or recall with it.

All that said, I have never had problems with Tremblefist with a variety of classes in the high 20s and above, sans defender.