Both Goodwill and The Salvation Army are anti-gun. I'm surprised you found a store without a gunbuster or verbiage on the door. I OCed in to the Goodwill off Maynard Rd in Cary, since they had a sign on the door banning CC, not OC. The confused manager told me that she "wasn't asking me to leave, but wanted to know if I didn't mind leaving." She didn't even say someone came up to her saying they were afraid, she said someone came to her and made it known that I was carrying, and she could "sense they might have been scared." I went back at a later time, and they got rid of the "no concealed weapons" sign and put up a "no weapons" sign. Every one I have been to in the Triangle now has this message on the door.
When I was at the SA store on Tryon Rd in Raleigh, a manager came up and asked if I was an officer, and I asked why he was inquiring. He replied that they only allow officers to OC in the store. I asked if this was his rule, or the corporate office's rule. He replied it was a corporate decision, and there was a sign on the door. I told him I always check the door before I come in, and there is no sign. He takes me to a corkboard inside of the building where people post lost pet signs, for sale posters, etc, and removes several layers of people's crap to display his gunbuster sign. -.-
He then taped the sign to the door, and while he was doing that, I informed him that a criminal wishing to do harm to you/customers or rob the place doesn't care about your sign..it only keeps the law-abiding from giving you their money. He replies, "Well, we aren't worried about that."