Bingo! That's the problem. That's the attitude that I want to avoid. When someone wears jeans or shorts to work, it demonstrates that they have problems with adhering to societal norms and traditions. That's not a professional attitude, in my opinion, so I look elsewhere. A dislike for following the rules and "playing the game" is not a good vibe to be letting off from a pilot.
I guess we'll just have to agree to disagree. I think it shows they are a bit of a free thinker, not a lemming, and aren't afraid to push for change when it makes sense. I don't think it's any reflection on their ability as a pilot, and frankly I prefer pilots who don't blindly adhere to the "system." It allows for more fluidity, and better decision making.