Good for you.
I agree with the sentiment wholeheartedly.
I remember, before I left the States, last spring when the mask mandates in my area were gradually lifted, I had this personal policy: if a business had a mask required sign that said "due to government policy, you have to wear a mask" I kept my mask off. If a business simply had a "mask required" sign up, then I either complied with their requirement or found someplace else to go.
It was sort of hit-or-miss at the time. Virginia lifted their mask mandate first, then Central Maryland (Howard & Anne Arundel), then finally PG & Monkey Counties. I can't remember if the District ever lifted theirs or not (usually didn't shop or dine in the District so can't remember).
As to Costco, I remember at the time it was hit-or-miss depending upon the GM of the individual store. The Costco in Columbia MD was hardcore about keeping the masks on unless you wanted to go through the 3rd degree about vaccination, while the Costcos in Ellicott City and Glen Burnie were perfectly fine with whoever going in maskless.
You are SPOT ON with your comment about property rights...if you have a maskless mandate at your home, people can either comply and remove their masks or get off your property. Same deal with a store. If they have a mask mandate (or a mandate to remove masks), either comply or leave. Simple.
Costco is a private business.
So if I. G. Farben ran the gas chambers at Auschwitz that would have been kosher, too? After all it was a “private business.”
Surrender to violent Marxists and the corporations who support them will not end well. Guaranteed.