1) Heating a non-stick pan with nothing on it, so long that it would fume, is just plain dumb and can easily be avoided
2) Heating foods to 600 deg in your pan is also really difficult, especially if you're cooking with butter or olive oil, if you're even somewhat attentive to what you're cooking and can see and smell your food burning beyond recognition
3) So why does the article advocate using cast-iron, and a particular brand at that? Even if the person writing this article is not a shill, which we don't know, it does look suspicious to point consumers to one possible solution when most of the market out there clearly prefers another (stainless steel)
4) I'm no fan of non-stick either, but really for performance reasons. Scaring people away from non-stick because of what might happen if they do really really dumb things in the kitchen just seems wrong. Would they also advise against using gas stoves?
there's food, and then there's food