...Don might be an excellent instructor* and his seminars might be good (if overpriced), but I'm with geezer in reacting poorly to this sort of manipulation.
*(Since opting to stick around and participate in other threads, Don has made comments which show me that he does have some knowledge and experience as a martial artist. As I noted earlier, nothing on the website or in his initial comments in this thread actually gave me any evidence of this.)
I've known and even trained under martial artists who believed in practiced the same kind of salesmanship that you describe in your post above. One in particular is very good in the system he practices, is a great instructor, and although he is pricey, he is a very honest businessman. But he really believes in selling himself in a way that would never work for me. He has tried repeatedly to get me to adopt similar practices, and to this day can't understand why I won't adopt them.
To him, my reluctance to get out there and SELL is almost like a character flaw ...otherwise we are friends. From my perspective, his use of these kinds of sales tactics is almost like a character flaw in a person I otherwise like and respect.
What can I say. It's almost like religion or politics. We are who we are.