[willy]

Most states, require a vehicle to be essentially as the manufacturer made it.
Jeeps ups etc. are vehicles that have been approved safety wise to run with no doors structurally wise, that is a significantly altered vehicle.

That is what I would say in my former ego, even though I still would not bother the guy unless he was acting up and came across my path for other reasons.

In my current cheezeburger in paradise guize I would smile and see if there were any chicks in the car 8)