There are plenty documented cases of retail tampering. Consumers need to be made more fully aware. For instance, the woman who bought an $138 box of rocks at Walmart, fully expecting it to be an Nintendo DS etc. Once the factory seal breaks the burden of proof usually rests on the buyer.
I doubt that these drives are retested by Kingston before being repackaged. So I guess it's possible for this to have been a factory mistake. Although the drives are individually tested by Intel before shipping, and these drives don't share the same hardware ID. I would imagine that immediately sends up red flags, but who knows.