Jim you did not answer the question. As usual. So I will ask again.
If sit ins and open carrys result in LE and business owners insisting that every business post no guns allowed signs, then what good will your permit do?
They can do it. They will do it. And if you carry after a sign has been posted you are in deep dung. Effectively it will kill ANY KIND OF CARRY.
Ohio is the only state I know of where very widespread business "no packing" signs went up, and even then a lot came down.
First point is that the signs didn't happen when the mass OCing went on, they went up when the CCW law was passed.
Second, the reason for the signs is that the Ohio state police went around to businesses handing out the signs and claiming they were mandatory. That stunt didn't last long and a lot of the signs came down later.
As it stands now, Ohio's rate of private no-packing signs is slightly high but not all that bad from what I hear. I know of no linkages between OC and high rates of no-guns signs.