Never trust a psychologist, especially one from Strathclyde University. Alastair Ross was asked to comment about wearing rock t-shirts and came up with the following;

Cradle Of Filth
If you'd ever wondered what metallers Cradle Of Filth thought about organised religion, they had a shirt with a comment about Jesus to tell you. This has seen the band enjoy notoriety their music alone might not grant: a Devon man was given 80 hours community service for wearing it.
What it says about the wearer:
"I think wearing this indicates a personality disorder," says Alastair, "But it's more meant to create an effect than to be taken seriously. Some people won't agree, but this probably reinforces the status quo: Jesus jokes are 10 a penny. Obscure shirts are a high risk strategy: you're less likely to find a match with people who think it's cool, but when you do, it's a more special moment."

If he's the same Alastair Ross I went to school with, then he was a trumpet playing, puggy addict with no friends outside the world of role playing games, who spent all his time in Leisureland in Lothian Road.

The irony is rather interesting really.

As a metal tee-shirt wearing devotee, I feel that there is nothing other than a personal expression with wearing a band tee-shirt. Obviously the wearers want to align themselves with a certain band ... or group of fans but wearing a band tee-shirt is considerably better than something with the words 'Nike Air' emblazoned over the front.

Although I am guilty (to a certain extent) of the latter too.

My problem with T shirts is;

How do you know you're going to come out the other side? And if you do come out the other side, will it be the side you expected to come out of, or somewhere completely different?

Hence why my T shirt collection is for display purposes only