This concerns the RPGs hosted by WARRIOR2006, and everyone who has participated in them.
Personally I think it should be possible, if appropriate, for the gameleader to kill a character. It gets eventually boring if we all are invincible and can jump into the jaws of danger and count on getting simmed out. Of course it'd be annoying if someone would fall dead from a random arrow in the very beginning before anything has really happened, but jumping up and down before the enemy artillery battery is just to ask getting killed.
A dead character is dead, period. No long OOC debates about whether it was appropriate or not, that just complicates things. Obviously killed players would get to respawn as another character/champion elsewhere on the field of battle.