One of the most cliche of all GM problems is dealing with a thief PC that steals from the party. It ranks right up there with "the Thief and the Paladin" problem. Most GMs will come across this problem sooner or later. In this article I give some tips for dealing with the problem from an experienced (30+ years) GM. Our goal in finding a solution to this problem is to find a way to both make the game more interesting and to deal with the problem in game without generating a player vs player conflict that can disrupt your gaming group. The first stage in setting up to deal with this problem is to establish your position early to your group of how you will deal with it. My preferred position is that it will be discouraged, but always dealt with in game. I usually also add that I will not allow player versus player combat, excepting perhaps nonlethal actions. This gives the players some options without leading to the gaming group-killing scenario ...
Chronicles of an Elder GM Running, Hacking, and Sharing Advice on TTRPGs