I have read far too many stories about these canisters going off when heated to consider the possibility remote. We are not talking about 130F, we are talking about a lot hotter than that.

I don't believe for a minute that these canisters are perfectly safe as you seem to imply when they are used in a manner for which they were not intended or designed. I could be wrong, but since I'm never going to be anywhere near anyone trying to heat up one of these things, it really doesn't matter to me what other people do with them.