A notch or more

I was reading about character death in the CKG and there was a part on WW1 flying aces and counting kills. This was given as an example of what not to do with your player's characters as a CK (DM/GM/Referee). But as I thought about this I find that its the perfect thing to do to your GM screen. I proposing putting a red dot (although I might print skulls) on the player side of the screen for every character that dies. This is great especially for d20 where balance has taken the danger out of adventuring. The more dots you have on the screen the more the players feel they have to get serious about what they are doing.