One t-shirt shop had a number of fun shirts:
<ul>
<li>"Don't hate the player.  Hate the dungeon master."</li>
<li>the word karma above a recycle logo</li>
<li>series of labeled shapes: pentagon, hexagon, oregon</li>
</ul>
Another shop sold one saying "Jesus likes you as a friend."  I had to 
think about this one before I got it.