It is easy to say employers have absolute control over the interiors of cars and trucks allowed on their property, but I think the courts would disagree once an employer started such nonsense. The media will support anything against a gun, but an employer that tried to ban baby seats, or plaid seat covers, or carrying a spare tire, a bible in the glove compartment, or keeping windshield washer fluid in the windshield washer fluid holder would lose in court, justifiably so.
They have absolutely no control whatsoever over the interior. All they can do is say "park" or "don't park". That's it.
I think the courts would disagree once an employer started such nonsense.
That's probably true, but not very interesting; the court has a very sketchy history of upholding property rights--not to mention other civil rights.
...justifiably so.
In other words, you believe in taking away people's property rights unless you agree with their decisions? Nekulturny, Kamarad!