This may be the only time ever that security through obscurity works.

This is the only way that I can think of to share a key with n number of people without giving it to everyone in the world. If I were a person who really needed this eg. epileptic, brittle diabetic, an alztimers patient, a person suffering from MS, a person with a mental illness, this would be better than 1. having it unencrypted, 2. having the key available to anyone with a minor interest, or 3. dying because no one could get my info.