I think that the only way a person can hurt himself or herself is to try to remove the cabinet from the unit to gain access to the inner workings or machinery, and that could be POTENTIALLY DEADLY!!

There is very SERIOUS high voltage inside there!! You might just as well go to the subway station and step on the third rail!!! Not that you would, but you know what I mean.

I have one but use it only to heat things up or melt things.

That's mostly what I use mine for.

But it's also great for steaming veggies as well!

I use mine to reheat leftovers and make popcorn.

I don't even use mine for popcorn. Seems to me it comes out dry and crumbly when cooked that way.

Mine is used for defrosting frozen stuff, reheating leftovers, melting butter. And as an insulated box for keeping stove-cooked things warm (that is, the nuke isn't turned on).

I can't imagine cooking in one of them. All you're doing, actually, is steaming the food. That might work for some veggies (having never done it I'm guessing). But actually cooking something? I don't think so.