It's a good idea, I know for sure 2 big guys with dirty tricks. Anyway, you'd use some trustable friends instead of an "open community" action, since you don't know who's into this, and believe me they'll be between the testers just to know which is the testing account. Simple as A-B-C. Now, if nobody knows about the account, that's a completely different thing.
And from the list of sponsors you gave, nobody showed up yet telling something (whatever). Pretty curious, huh?
Anyway, good luck, would love to see the results!
