No, that's self promotion.
It comes down to this... You represent yourself with your choice of clothing. Why would I want to represent myself as a Tech fan by wearing a Tech T-shirt, when I'm already at a Tech show? Obviously I like Tech if I'm there. I should have just worn an MC Chris shirt or something. It's weird I guess, how I look into shit sometimes so maybe it's just me. There's a line you cross where you become a fanboy, and wearing a Tech shirt to a Tech show is fanboy shit to me.
But then again, I'm like 10,000 posts deep on the siccness so... I can't deny it.