Maybe it's just my perception of things, but that it kind of sucks to sleep kill anyone, because, essentially, they are offline, don' t know what's happening, and cannot get in on the RP of their character's demise. Using code to kill someone, however easy it is to just type 'kill <insert random sleeping character here>' is not an IC solution to anything. No RP is generated from it, and at worst, a player has lost a character. I may be preaching to the choir here, but losing a hard earned character fucking bites the llama's hairy ass, and if it's IC for one character to sleep kill another, there had better be a good reason and some excellent RP involved when the dirty deed is done. This is a MOO built on RP. The code is there just to make RP easier, and it should not be used as an exploit to easily kill off another character.
Hell, it might be interesting to see implementation of some sort of automated chance that the sleeping character will wake up, and a bit of 'sleep fighting' will ensue, in which the sleeping character, though offline, can fight an attacking opponent and remember it when they wake up, or perhaps not remember it, only to find a dead corpse lying next to their sleeping spot.
Just two more chyen,