Given my stance on being a douche by violating the Terms of Agreement in the Costco thread, as well as agreeing that there's little motivation to support a business that clearly doesn't support me, I say fuck 'em.

However, soon enough CO will be just like AZ. If they can't actually ban guns, they'll just plaster signs everywhere that's private property. At that point, concealed is indeed concealed, especially given that all they can do is ask you to leave in the event that they somehow see you carrying.