What does it say about his Scout Spirit? Scout Spirit is defined as
living the Scout Oath & Law in your everyday life.
How does that translate into wearing or not wearing a uniform.
Just to be ornery, I'll take that one on...
A Scout is Loyal - How is loyalty shown when you don't honor the organization to which you belong by wearing its uniform?
A Scout is Courteous - Is it courteous to show up for a formal activity and not wear the the appropriate attire?
A Scout is Obedient - If a Scout knows his troop leadership expects their Scouts to wear as much uniform as they have to Boards of Review, what purpose does it serve to be defiant?
As I said above, I agree that no Scout should ever have his BOR turned down simply because he isn't in uniform. However, the act of choosing to not wear the uniform when the Scout knows the uniform is expected is an act of defiance and not in accordance with the Scout Law.
Please note, Ed, that I only answered the question because you asked. The point of view I've expressed is definitely a bit far to one end of the spectrum but only about as far as ignoring the action of the Scout is to the other. The world is not so black and white.