And I applaud the instructor, 'cause he was probably making them take the "full" course, and not a refresher course. Without him posting it would be hard to determine what his thoughts were. They were already probably P-Oed that they had to mingle with the newbies. They were trying to impress everyone, and the instructor did not buy into their little tale. You surely don't need a c-card to take an OW class.
Personally, I have met many of these same type of people. They are more interested in everyone thinking they are the best than in becoming the best. Humility is hard to acquire. As a society we favor the bold and self reliant, and not the meek. Humility in any endeavor requires one to have an accurate assessment of how much they know or don't know. It doesn't mean you can't have an opinion. It doesn't mean you have to be Casper Milk Toast. It is NOT low self esteem. It does mean that when you pay money for a class, you shut up, listen, absorb all that is there, and ask as many questions as possible. The instructor (and your class) really does not want to hear how you think you used to do it back when you were whatever you were.
On the flip side... whenever I do encounter people like this I cringe. And after I get over the initial revulsion, I do a "Pete-check" just to see if there is any of them in me. If there is, then I have my work cut out for me. I never want want anyone to ever look at me and say... "Hey, that guy is just like that couple that walked out of my class the other night." In life, it's always best to start with the man in the mirror...