[Bald & Bearded]

First this is a great discussion with a lot of points on all sides of the issue.
I do have to agree with JesseK that if a simple and reliable solution is not identified FIRST will have no option but to go back to the metal tanks.

I would be great if we could get consumer reports, mythbusters or someone of that quality to test various sleeves/coverings.
I am not a physics person but from an intuitive point of view a sleeve/shroud of some kind should reduce the danger.

User error is the real issue.