Syntax: playerkiller, y, password
Player killing gives everyone the chance to seek revenge against their mortal enemies. If another player kills you, you are no longer a playerkiller.
Only level 20 players may be playerkillers.
You cannot wimpy or quit during a playerkiller fight, and all astroports are fightable areas. There are very few safe rooms on the mud.
Above all, have fun and remember it is just a game.