Seeing the RE invests in Stark Future thread reminded me that there are a lot of funny T-shirts floating around. I have a couple that I like.
I have a T-shirt that I was given many years ago when I attended a street paving seminar. It has a picture of the earth like the one on the Stark Industries hoodie example shown in the RE thread, but says: "pave the planet, one world, one people, one slab of asphalt". (It was printed by the Asphalt Institute.) I kind of have to watch out where I wear that shirt.
I have another shirt that got me in trouble one time that I bought myself. It says: "Don't steal, the government doesn't like the competition". That one was not appreciated by the city manager when I wore it to a city park public "open house" event.