Last month, Microsoft very quietly swept a broom through the Xbox Live userbase, finding—and banning—a number of Xbox 360 owners for "illegitimately [accessing] Xbox LIVE Marketplace downloadable content".
As the company "will not divulge additional information regarding individual suspensions for these offenses", it's unclear what brought on the crackdown, or how the culprits were able to access content "illegitimately".
What I find interesting is that Microsoft claims, in banning these users, to have "clear evidence" that each person affected was violating the console's terms of service. But if the company "will not divulge additional information" on the cases, then how do we know they do? Sure, 99% of users are probably guilty, but what if 1% of them aren't?