Would each user have to fill out a form against them or how would that work? Anyway, I don't buy this apology. Mark knew exactly what he was doing. He was even warned about doing this many times, and he didn't listen. But now that he got caught by FTC he "admits his mistake". Right.
Could make a fb app for submitting the form - lolz
Make no mistake, FTC oversight of FB is a net-plus for FB. Their actions will be relatively unassailable from now on, since if the FTC (who is supposedly looking over their shoulder) doesn't have a problem with it, why should anybody else? Rinse and repeat.
Ask me how my user-oriented social network app is going! :)