Is it safe to roast marshmallows over a sterno flame? It's become common practice around my apartment to use a sterno to roast marshmallows because it's easy, cheap and (primarily) because we can't have a campfire in my living room.

Is this dangerous?
After contacting Sterno with the same question, they indicated that the only safe gel product for direct food heating is marked “ethanol” on the canister. Those marked “methanol” are not meant for direct food heating.