If what concern the leakers is the eventuality NPD catch them, there're maybe other better solutions to think of than obfuscation, like giving the numbers to a mod only who can then share them, or to an external anonymous source - blog, twitter account... - located in another country (making it harder for NPD to act) where these numbers could be posted (gafers with access to npd data would only need to validate these leaks from time to time)... I mean, it's not like what we care of is exclusivity, right?