Hi Nemo,
You really hit a nerve with me. I have been and instructor in Northern California for 17 years and I'm sure that we could compare notes and have more than a few laughs (and gasps). Here are a couple of stories. I watched an instructor doing an emergency swimming ascent with a student, no line no nothing. When they surfaced he told the student "You held your breath that's why I punched you in the stomach" I alter read in the PADI undersea journal that he had been expelled. I saw another instructor with a cigarette in his mouth helping a student get her obviously poor fitting glove on her hand. He was using both hands to help pull it on and the smoke was going right into the students face. If that wasn't enough he announced to the class "Okay if you all don't get suited up right now I'm going to turn into an a**hole" my divemaster was near by and he said "I think it's already too late"
I always try to make sure that no matter what is going on that everyone has a good experience. I think that as a dive leader we are ambassadors to the sport, we have an obligation to our students.
I have been with several unprofessional dive operators. As experienced divers we can overcome almost all of the incompetence but I am always concerned about what the novice divers will think of diving.
Cheers,
Michael