Should I change the way I dress when I go to concerts?

I think people who let their music preferences dictate every aspect of their lives are pretty silly. Just wear what you want. If you only dress punk at shows, then they'll rip on you for being a poser. So just tell your friends you're not interested in wearing a uniform so you can "fit in." I think it's pretty cool that you don't feel like you have to dress the part. Kind of makes you more punk than the punks because you refuse to conform to the subculture.