I believe he's a pilot, with some kind of vendetta against Mesa. I don't for one second he spends this much time posting this stuff out of concern for the safety of Mesa's passengers.
Bottom line, he can talk all he wants, planes are coming, classes are full, and not with a bunch of idiots. I will admit there were a number of people in my class that would not have passed an interview at some of the other regionals.
Having gone through the training, in my opinion, anyone who can't pass isn't motivated or just shouldn't be flying airliners.