I was a lazy bum until I completed my first season of DCI. Completely turned my life around. Wouldn't be in college had it not been for my first season.
Please don't wear it to high school marching band competitions. Simple conversations do so much more than sporting a jacket. Obviously this isn't a rule or anything, just my $0.02.
Doing your research or watching a simple YouTube video will do you wonders rather than watching a DCI video. I'm both a fan of the Cadets and Richard Dawkins