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I do think it was inappropriate to say "this person is not a professional" simply because we have differences of opinion.
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If you look at my posts, I never made that quote. I did say that the behavior was unprofessional and that professionals do not behave in such a manner. I'll stand by that. However, gleaned from the tone of the majority of FlyChicaga's posts, he is very diligent in his work; the mark of a true professional.
In regards to some of the other posts. I do think I'm a "real peach" to fly with. At the conclusion of every trip most guys shake my hand and state what a pleasure the trip has been...and that mutually we can't wait to do it again.
I love my job and have more fun doing it than you can possibly imagine. At the appropriate moments I laugh, joke, scheme, show pictures of the family, flirt with the flight attendants, talk politics & religion and do all of the light hearted things that you are allowed to do on the job (and still keep it).
However, once the door is shut and the jetway is pulled, things change for a while. Business starts. This doesn't mean the fun stops...it's a different kind of fun. It's the fun of being part of a disciplined, professional flight crew. The cockpit is not cold and rigid, but casual and businesslike; the fun and games have ceased (at least temporarily...above 10,000MSL things become less critical and I say laugh away).
In ten years of airline flying it has been my observation that most professional flight crews behave in the manner mentioned above. If someone were to laugh unceasingly during the high speed portion of the takeoff...through the initial climb...I would suspect the other crewmember would have doubts as to that person's mental preparedness to handle tasks that may occur in the immediate future. Arguably, the most critical part of every flight, in terms of potential events and the decision making skills requisite of those events, occur from 100 kts on the ground to 1000' above ground. If nothing else, this may be a good time to be composed and mentally prepared for worst. After all, we should be prepared for the worst case scenario before and during every takeoff, right? Some pilots may be good enough to have this level of preparedness while laughing uncontrollably...I know I'm not that good.
Lastly, would you display this type of behavior with the FAA in the jumpseat? How about your OE check airman? Your chief pilot? If your answer is no...then I'd have to question the professionalism of that behavior.