A straw man is a component of an argument and is an informal fallacy based on misrepresentation of an opponent's position, twisting his words or by means of [false] assumptions.[1] Exactly describing the core of your arguments presented, such as when you pose your ridiculous questions "So you think a child should be able to do any work, no restrictions at all?"
Asking you to define your position isn't making an assumption (false or otherwise) about your position, it isn't a misrepresentation, nor a twisting of your words. You should read the definitions you post and choose the ones that support your position, not the ones that contradict your position. When you defend the statement "child labor laws are stupid" you are going to have to expect to be asked exactly where you stand on the restrictions of child labor. In short not a straw man at all.