I don't think the point of having medical info on the flash drive is in case you are unconscious. It seems to me it's more logical to have information about surgeries you've had, hospitals stays for other reasons, major illnesses, when your last tetanus booster was. Not that a hospital would accept that as an official record, but as a way to keep track of your medical history to help them have a better idea of your past heath issues.

I don't have information like that on my flash drives yet. Most of what I have on there is non critical from a security standpoint, but I keep it encrypted anyway, because it's nobody else's business.