Matt and I are having an argument (heated discussion, really): is it unsafe to heat up a can of soup over a campfire? That's what I've been doing for my lunch lately, and he says that heating food in the metal can releases toxins that can be dangerous. I say that's hooey.
I checked Snopes and even Ask Jeeves (which was totally useless and just came up with a bunch of advertisements), and got nothing remotely conclusive.
Has anyone else heard this? If so, is there any documentation on it?