What do people think when they see you in your scout uniform? Believe me, people notice a young man in a scout uniform. They expect something more from you based on what they know about scouts.
When you're in uniform, people know they can trust you. Everyone knows that scouts take an oath "to help other people at all times" and that scouts "do a good turn daily." If someone needs a helping hand they know you'll do what you can for them.
When you go to summer camp, klondike, jamboree, or any other large gathering of scouts in uniform, you know you're surrounded by friends. Your uniform says you are part of the worldwide brotherhood of scouts from all races, religions, nationalities, and backgrounds. If more people treated each other like scouts do, the world would be a peaceful and friendly place.
That's what it means to wear your scout uniform. Wear it proudly.