I don't see how turning up a collar shows disrespect or affects learning. DD2 was mature and sensible. She understood there was a time to conform and a time to express herself. She challenged what she felt was a ridiculous rule. A turned up collar could get her put into isolation when the school was falling apart due to bullying which they insisted wasn't happening. Most teachers described her as a pleasure to have in their lessons because she would challenge them in a reasoned manner and make them think about what they were teaching. They enjoyed the to and fro of debate.
She had a very successful work experience. The company commented on her mature attitude, willingness to learn, time keeping etc and imo importantly she was complimented on her ability to use her own initiative.
If we train our children to conform mindlessly then we risk weakening their ability to think for themselves.