Originally Posted by Atlas
Your employer, maybe so.
Become an employee of companies like VW or BMW and they will tell you that their rules are the rules, including the parking lot.
You will be required to sign an agreement to that effect, which includes your termination if you violate those rules.
It's not just the risk of termination that's the issue here. In TN, a posted sign as minimal as a 3"gun buster decal has the force of law, bringing a misdemeanor charge, $500 fine and possible loss of your permit with it.