Michaelh, before saying us how to do good RP, try to have your own RP, a different than : "I shot everybody, because I am a raider, and dont come to cry because wasteland is harsh" -> The poorest RP of the game.
More over when you kill somebody wearing a robe, how do you know Michaelh that this guy hiding is face is not a CS ? You cant know, so you criticize what you also do.
For the robes, as we are in a guarded town, we can say that the militia checks the face of poeple before entering in town. And you know, WWP have list where poeple are designed as troublemakers, a kind of wanted list, in the sheriff home.