Stopping Players From Killing the Warden

My least favourite thing about the minecraft community is that everyone complains when they go through the effort to kill the warden and it drops nothing. I love the idea of a mob you avoid, not kill. I think you should make the warden not take damage (unless being killed by a player in creative). If not, killing the warden should give some sort of debuff, like "the skulk curse" or something like that.