More importantly, the Court in Kyllo relied heavily on the heightened privacy interest in one's residence. This would be out on the public street. Not saying I think it is okay, just a point of distinction.
Jim's Rules of Carry: 1. Any gun is better than no gun. 2. A gun that is reliable is better than a gun that is not. 3. A hole in the right place is better than a hole in the wrong place. 4. A bigger hole is a better hole.
no guns = might makes right