I would definitely wear the t-shirt. It would explain my behavior to the world and,then people would realize i'm not stuckup, uptight or unfriendly at all.
I also always fear that people think I'm unfriendly and stuck up, because a lot of the time I have a fear to say hi or even look at a person. But with lots of the people that I eventually know and say something to me they say that they could easily tell that I'm an extremly shy person. I need to really need to work on trying to say Hi to people and looking at them lol