Lord Zardoz
Explorer
Players are generally pretty good about making characters they like to play the first time. Losing a character can be greatly inconvenient. On top of that, later levels assume that death is not that big an obstacle, and even the monsterous manual states that if your customizing a monster, and in a test it drops one of the players, that its all good.
If you want to close that revolving door, you may want to make the lobby much larger. The players should have plenty of chances to stabilize. You may want save or die spells to result in hitting -1 unstableized instead of dead.
Also, do not close the revolving door for the players but keep it open for plot critical NPC's. If my PC has to bite it when I eat a critical hit from a low level archer who managed to roll consecutive 20's, then Lord Doom also has to bite it when I score an unlikely hit as he was escaping.
END COMMUNICATION
If you want to close that revolving door, you may want to make the lobby much larger. The players should have plenty of chances to stabilize. You may want save or die spells to result in hitting -1 unstableized instead of dead.
Also, do not close the revolving door for the players but keep it open for plot critical NPC's. If my PC has to bite it when I eat a critical hit from a low level archer who managed to roll consecutive 20's, then Lord Doom also has to bite it when I score an unlikely hit as he was escaping.
END COMMUNICATION