“Condition Three does have its place for carry, however. If I am carrying a gun like a Glock, which does not have a manual safety per se, and do not have access to a holster which covers the trigger guard (as is strongly recommended by the Glock factory), and have to shove the gun into my waistband, I'll make sure the chamber is empty.”
I don't see why anyone would carry a Glock without a holster in the first place. Its never even crossed my mind.