Better dection of if the player is a staff or not. You could be able to check if a player just has NC to let him in a certain room. Or let people with the NC have debug acces to a NPC.
Like:
NPC Code:
if(playerisstaff[3]==true){
//stuff here
}
Being the 4th place in the variable is the NC option.
edit: ofcourse this would be read only 