There a few concerns.
Thanks for the reply...
However, again, I wouldn't imagine most people using them but in the most dire of situations, and at such a point, life would probably be a gamble anyway. With some cursory knowledge and a prayer perhaps the gamble works out and if it don't, you would probably be dying soon anyway. It might be nice to have an option. An even more plausible use of these might turn out to be an excellent item to barter with.
I think that some folks here don't understand the desperate situation that the layman may have these on hand for.