Why not swing over to Demokratees. This site has dozens of politically charged, left-leaning t-shirts, and three (well, two t-shirts and one hooded sweatshirt) with eco-conscious, anti-big fuel consumption messages. The one on the left there is the sweatshirt and the message is pretty obvious. The middle one says "Eco-terrorist" on the bumper sticker and the one on the right says, "Raise less corn and more hell." So, if you're looking for a way to bust out of your confines this spring, here's one idea.
BTW – I have zero financial interest in Demokratees. I just discovered them, and think there might be a few of you out there who appreciate the sentiments on the shirts. No funny business here at AutoblogGreen.