While this is awfully passive aggressive, here's an idea to healers who find berserk macro offending. Have a macro that casts your healing/shield bubble with "/p casting sacred soil/asylum. Please stand inside the shield/regen bubble". Start using that macro if the party tank uses berserk macro. See how it goes from there. It doesn't actually hinder anyone's play, but if they do take offense of it, you can point out it feels the same as their berserk macro.