Re: was not stumbled across, but discovered after an active search
The bounty implies that there's a direct incentive for a Geek Squad technician to actually put material on a drive so as to 'find' it. Since they're assumed to be technically competent it would be almost impossible to prove they didn't.
We've had problems in the US with images of pre-pubescent children being flagged as illegal content. Some of the earliest were with drugstore photo processing back in the chemical picture days. Taking snapshots of ones children unclothed -- definitely a no-no in today's 'liberal' America. (....and we complain about the Taliban)