If your real intention is to ensure that dev conferences invite good speakers who maintain decorum and create good learning environment I think you should also take then pain to tell us what exactly happened instead of calling Douglas names.
A lot of people in tech industry tend to have strong opinions and are also under lot of stress. Sometimes people have bad days. It is important we all understand that and help each other.
“the talks as the day went on just got stupider and stupider.” He said.
I had the exact same feeling when I attended some dev conferences. I am not sure why it qualifies such a strong response from you.