Let this be a lesson: not all your problems can be solved by code. Sometimes you need to take a step back and think about the root cause of the problem. Often t

Let this be a lesson: not all your problems can be solved by code. Sometimes you need to take a step back and think about the root cause of the problem. Often times (as well as in Grouper's example), the solution is to reconstruct your model so that your incentives and/or consequences are clearer to your users.