He's probably not a Brony,more like a very dedicated Furry. Most of the Bronies I see are teen/twenty-something guys with an MLP t-shirt or hoodie. We Pegasisters tend to go in for the cosplay more, and just at conventions.
I wear MLP T-shirts and accessories all the time, I've got a Rarity shirt on right now. My Rainbow Dash cosplay is almost complete, I just want Aviator Goggles & an aviator scarf to complete it. My outfit is mostly street clothes, sporty things that Dashie would wear, and I have wings, ears, and a rainbow wig.
@Cndworf - being crazy is what I like about Canadians.