Parfit does a good job of covering this ground in Reasons and Persons in his discussion of threat-fulfillers and threat-ignorers. Let's see... you can read most of that section on Google Books, starting on p. 20 (section 1 part 8). A "threat" is a claim by someone that they will do X if you do Y, where doing X would make both them and you worse-off. In a world of transparency (shared source codes), Parfit comes out in favor of threat-ignoring (as well as promise-keeping).