I remember this conversation at the ISA website and also had a few conversations with this guy through email. He was very defensive to begin with because he had been attacked heavily for his views on spiking. I very much enjoyed talking to him and hope that he is doing well. Unfortunately from looking at his website he doesn't feel comfortable with the idea of not spiking or informed enough about the difference between topping, crown reduction, and pruning.
His position is far from my own, but I will say that calling a fellow tree climber names is indefensible. I have not found the tree guy that I agree with in all aspects, but anyone that is willing to risk his life at this job deserves respect no matter how right or wrong they are in how they do it.
Sorry if I have offended anyone, but the idea that any of us has a lock on what is right when it comes to trees is ridiculous. Shigo even backed painting wounds at one time.
Let me end with this. I have learned from those I thought knew more than me and those knowing less, but with respectful interaction I have learned that everybody has something to teach and to learn.
Brian