This is my question, too.

If these things will cook off at will, even if in a vented ammo can, lipo bag, you name it, I'm starting to not even want them in the garage or shop. Even if the fire is contained, the smoke is bad, bad juju. As has been said, it is toxic, and will cause unbelievable corrosion.

Problem is, I have some fun EDF's and prop-jobs, and I don't think the other battery types, even other lithium chemistries, pack the power-to-weight of a lipo.