Actually, I believe that has in fact happened. People have been cited for sitting in the driver's seat sleeping with and without the keys in the ignition. It was upheld in court if I remember correctly.I don't see consistency at all. I am stating that carry while intoxicated should be illegal (as it is) and no different than operating a motor vehicle.
The difference is that having a gun is not the same as operating a gun. To be consistent, you should want people charged with DWI for having car keys in their pockets even if there's no evidence they intended to drive.
Since we seem to be on a DWI tirade, does anyone have some statistics that show what the average BAC is for drunk drivers who have caused accidents? Most of them I ever hear about are far above the current legal limit. Another question would be what percentage of them already have DWI convictions?