I used that stove on a wood table at work the first time I fired it up. While seasoning my woks I smelled something "off". I pushe dthe stove to the side and found a hole burned completely through a 2" thick wood table!
Now I only use it on the metal welding table, or I set it on the grating of my charcoal BBQ grill. Eventually I plan to make a metal table with legs similar to those that support a gas grill.
As far as giving away the self-heating woks, I don't own one, and if I did I would destroy it so someone wouldn't waste good time, food, and money trying to turn out a decent stir-fry. I'd feel guilty passing it off on someone else.