OSHA/WISHA mandates are meaningless. I am unaware of any state that I have traveled that bans the bearing of firearms by the owner of a business, or that owner permitting a employee to bear a firearm. OSHA/WISHA can pack sand. Insurance companies may deny service (coverage) based on any reason, or no reason. Typically, they will jack up your premium(s) because they need your money. Not admitting that those businesses likely have a far lower claim rate for things such a robbery and other crimes.
Anyway, the discussion is about guns and a property owner "discriminating" against a gun carrier. So, is Costco discriminating now? To some it seems that they are.
Deny you your claimed right and then you (royal) ignore their claim...hmm...
Seems it is a battle between claims.
alas OC4M, the point about OSHA was to address the mentality of a specific reader who objects to employees not being allowed to carry firearms.
ipse