+Dan Eastwood - in a few weeks, post an interesting comment or question about the game theory notes on my blog. That'll let me know someone is paying attention, and that'll increase my payoff.
Re vilification, I read something years ago that said psychologically most humans are happy to make minor bendings of rules but don't like it when they or others seriously violate rules. As a consequence, if you have a set of rules you want obeyed, you should design a stricter set of rules whose "acceptable breakings" corresponds to the rules you originally wanted. So there might be "keep of the grass" signs in order to stop people actually, eg, playing ball games on the grass, but expecting light walking to occur in practice. How to model this mathematically...
I like that idea, +David Tweed. When I was a young mathematician very concerned with precision, I wanted to formulate a theory of vagueness that could handle all sorts of things like this. Unfortunately I wanted a precise theory of vagueness.