I don't agree that yelling should be tolerated at all, unless it's simply a situation when the other person cannot hear, and that does not happen to often in cockpits anymore. If a person, in an emotional situation yells (or uses the clipboard for a purpose other than intended), they have lost control. So, they either lack the ability to remain in control, and keep control of themselves, or they just don't care. Either way, that's not what I want to learn.I never yell at anyone else, why would I yell at another pilot? When recently taking type training, I continued to fail to remove my hand from the throttle during takeoff as directed, it's jut violates my instincts over 30 years of flying. But my mentor had a reason for this direction. After being quietly told a few times, subsequent reminders were not yelling, they were a gentle nudge on my elbow. My mentor has no aspirations for the airlines, he is 76 years old. I will learn from him al I can, when ever I can, including being polite and effective in the cockpit. Why would we teach adversarily? It just legitimizes such poor behaviour in the cockpit for future pilots in multi crew environments.Pilot DAR