U. S. Constitution Pin

Tom McMahon is pushing a "U.S. Consstitution Pin" (link) for, as he says, those too liberal to wear a flag pin. But there is no reason to stop here, right? I bet there already is a "Second Amendment" pin, and I'd certainly entertain a "no cruel and unusual punishment" pin, or just a simple "habeas corpus" pin (make the flag pin types really pussy when you start getting too specific about what the Constitution really means). Me, I'll settle for "letters of marque and reprisal," or just "no quartering of soldiers."