Here's my first stab. Crazy, as a folk psychology, is when people act in a way that is both contrary to their own interests and harmful to others. If you put it into four-square it would look something like this:
self harm + other harm = crazy
self harm + other benefit = possibly genuine altruism or possible self-sacrifice
self benefit + other harm = evil
self benefit + other benefit = good
self harm + other harm = crazy
self harm + other benefit = possibly genuine altruism or possible self-sacrifice
self benefit + other harm = evil
self benefit + other benefit = good
