There were plenty of unarmed people at the time of the signing of the Bill of Rights.
There is no doubt in my mind that the founders would have been appalled at the idea that property owners could not chose who would enter their property.
They would also be appalled at the idea that people be searched for arms against their will.
The only reference to private establishments banned arms that I have found was an institute of higher learning that banned students from possessing guns on the basis that it would be a distraction from their studies.
And it was a problem.
The founders recognized that self defense is a right.
They would be appalled at the thought of free men being denied that right.
And for what, to make criminals feel good about themselves?
Give criminals a safer work space?