I am sure it has nothing to do with firearm carry specifically, perhaps, just perhaps COSTCO’s local/area mgmt was too permissive in their enforcement of all overarching company policies and Corp Sr mgmt brought in new mgmt who weren’t part of the ‘good olde we do it our way group’ told them to tighten up across the board ~ no exceptions whatsoever!
New mgmt see raises and promotion in their future so off they march cleaning up the store with a heavy hand ...[in another life, been there, done this, enjoyed the revenue and you only have to terminate a couple of egregious offenders and then everybody decides to play nice by establish policies - thus a new store culture is born and inbred across the board]
Further, everyone’s attention to this 2013 OCDO thread:
http://forum.opencarry.org/forums/showthread.php?95584-Open-Carry-Limit-in-Wyoming