I used to carry in my local VA Clinic. After a half dozen visits where my carrying may have easily been noticed, the entrance was posted. "For Your Protection, all firearms, knives and other weapons are prohibited on the premises."
In Ohio, being found to violate that posting is a permanent revoking of your ccw permit.
I leave my guns in the car and still carry the knife and Blackthorn Walking stick, neither of which count as violating the CCW law.
I've not objected to anyone either. I don't need to have a hassle trying to keep these benefits.
Didn't ask how being unarmed would protect me from anyone who chose not to obey that sign.