If you really care about what people may think of you for wearing a bloody tshirt then get of your shell. Who gives a damn what you wear? It's your choice where what the hell you want to wear.
It's generally the prejudge mental **** heads that speak out, and who gives a damn about them anyway?
I got over 30 different Megadeth T-Shirts that I wear day in day out, couple of shirts from George/ASDA, Ghostbusters t-shirt, FF7 and Advent Children and a few Intel ones. If people want to play thee old "oh looks what he's wearing" bags of laugh game I'm pretty certain what they wear is beyond laughable.
Perfect example, couple of girls in uni wear fake dreads and think they're cool. I'm mocked because I'm a big fan of FF7 at 19 wearing a tshirt. Guess they own huh?