I thought I would take this time to school some of the younger generation on the the very delicate issue of concert t-shirts wearing etiquette. They are not to be worn whenever you feel like it. There are time tested rules that should never be ignored.
Please fell free to add new rules if I have forgotten anything.
1. It is a total violation to wear the t-shirt that you bought at that very concert. (The violation is even more offensive if worn over the clothes you got there in.)
2. It is a violation to wear a concert t-shirt that you bought less than three weeks ago.
3. It's a violation to wear any shirt from the band you're watching unless you bought it over ten years ago and the band has all the same original members. Example, wearing a Van Halen shirt from 1984 to a Van Halen concert with Sammy Hagar in 1993 is not appropriate even though the required ten years have passed.
4. If you must wear a concert tee to a concert, please keep it to the same genre of music. However, the "I'm being ironic concert shirt" is always appropriate. A good example here would be to wear a Michael Bolton shirt to a Metallica concert.
These are only a few guidlines. I'm sure I missed a few. Just know that violating and one of these rules results in you being "that guy" .
Trust me, no one wants to be that guy.