The Gadsden Flag
The Gadsden flag was a slogan and symbol popularized during the American Revolution in a war against the British over the excessive taxation and control over the American colonies. Over the years it has remained a symbol against taxes and government control over the people.
In Oklahoma, and probably several other states as well, For an added $18.00 to the regular cost of your car tag; the tax of that vehicle by the state government, you can display that defiant slogan on your car. A lesson in Irony.