Did You Hear Me Say "What?"

Check out this website http://atom.smasher.org.

It lets you create pictures of signboards and graffiti of your own liking.
Here's a sample:
http://atom.smasher.org/graffiti/?p=1&l1=&l2=&l3=&l4=I%27m+with&l5=stupid&l6=%3C--------