Not really. I've known a few boys that did that. Most of the time they were the ones with medals on the jacket. The ones who do it as a fashion statement rarely have the medals to go along with the top.
Silly for someone that has never put his/her life on the line or for someone who has never lost someone who served their Countrey.
My basis for how military men react are my Grandfather and Uncles, who were career military, reactions to similar situations. They roll their eyes, shrug, and walk on. They weren't the type to get all worked up over little things or puff out their chests. The military was their job. They did it well enough to earn several promotions and make a good living, but it was just a job.
Maybe my Uncles and Dad growing up on bases around the world made them view things differently than the people that become involved in the military culture later in life.