+1 Absolutely essential for stealth. Just make it so if you're crouched you take crazy damage (X4 or something). It's realistic, if you crouch in a swordfight you're dead. And it has an animation to get into and out of (you take the X4 from the moment the crouch animation is initiated). Could still be used by Archers to snipe etc but if someone sneaks up on them instant kill.