[LittleRedToyota]

when you bring your property onto someone else's property, you become subject to that person's (or those people's in the case of businesses or other private property that is owned by more than one person) rules for being on their property...and one or more of those rules may be related to what (of your) property you may bring onto the other person's property.

the employer (or other property owner) does not have a right to search your car. but, he does (or they do) have a right to say:

"you cannot bring a gun onto my property, and i am going to require you to prove to me that you do not have a gun in order to stay on my property. as part of proving to me that you have not violated my property rights by bringing a gun onto my property even though i have asked you not to, i want to search your car."

at that point, you certainly have the right to say "no".

at which point, the employer (or other private property owner) has the right to either say:

"OK, then you must remove the car from my property." or

"OK, then you must remove the car and yourself from my property."

or, in the case of an employer:

"OK, then you must remove the car and yourself from my property and you are fired."

i really don't understand how you guys think that your property rights (to your car) trump everyone else's property rights (to their land).

should i be allowed to park a car with an aborted fetus (or whatever it is that you would not want on your property) in the trunk in your driveway even if you don't want anyone bringing any aborted fetuses onto your property? after all, it's in my car...and my car is my property...right?

of course i shouldn't be allowed to bring things onto your property that you do not want on your property--regardless of whether i have them in my hand, in my pocket, in my car, or wherever.