I found this old, not so up to date blog where this fella created a machine that attaches to his bicycle and sprays chalk messages on the side walk. I guess its his form of protest against Bush. It’s called Biking Against Bush.
Check out these videos:
Here’s his maiden voyage.
Here’s an old interview for MSNBC: WATCH IT HERE. He even gets arrested right in the middle of it.
(the opinions of bikesagainstbush.com does not reflect my own, so take it with a grain of salt)