My nephews are into Rock Band, big-time. I've played it a couple times with them myself.
They both dig "Who Are You," but I don't recall whether either of their parents have been in the room when Daltrey snarls that aside, "Awww, who the fuck are you?" I don't remember seeing anything more "parentally unfriendly" on their playlist, although I directed them to "Search and Destroy" as quickly as I could.