Not if Bob wanted Adam to break his leg. 
I think this is a really hard area beacuse free market and anti-exploitation arguments tend to argue right past each other. I think both tend to have some interesting, and even valid points. However, I tend to feel like anti-exploitation is making a statement about how we as individuals should want to act towards eachother, whereas free market arguments seem to avoid any talk of motivation, and focus solely on the transaction.
I think this is a really hard area beacuse free market and anti-exploitation arguments tend to argue right past each other. I think both tend to have some interesting, and even valid points. However, I tend to feel like anti-exploitation is making a statement about how we as individuals should want to act towards eachother, whereas free market arguments seem to avoid any talk of motivation, and focus solely on the transaction.
I don't understand what exploitation is. To me, the question is "am I in a better situation now than I was before" is way more important than anything else. I am concerned with maximizing prosperity for everyone, not what's fair and what's non-exploitative, who profit more, how equal is our society, etc.