I don't see much point in making your opponent waste a couple of seconds unless a town NPC abuse by a gang of shotgunners is planned, if you are fighting a player without any sniper covering your back it's useless, you just won't kill a player, he'll stand up and nail you if it's a BG or run away/cripple you with a mouser(to embarass) if you've managed to get at a shotgun range to a sniper build