Heh, I hear you--this is pretty delicate. "Cheaters gonna cheat, so...y'all ought to just collaborate" won't go over so well, I guess. 

I can't think of any super :sparkle: words for this paragraph at the moment, but maybe another angle to use is the fact that forking & collaborating is how we work at GitHub, and how many open source projects work (as you mentioned :point_up:).