[Fido969]

Well, playing devils advocate, if the store's policy is no guns (with a sign stating such)

That particular COSTCO had no such sign(s).

[Puppage]

That particular COSTCO had no such sign(s).

So it's been stated. Does that mean you don't pay heed to the store employee who tells you guns aren't allowed? /just ask'n

Really, all the sign does is stop on before they enter.