I don’t know how everyone else feels about this subject but personally I pay no attention to those signs that say that concealed weapons are not allowed. If the need for the weapon arises the fact that you were carring against the owners wishes means nothing. I was caught one time when a waitress saw my weapon and reported me to the manager...he asked me to just keep it hidden and it was no big deal.
See "Erik B. Scott, Costco Las Vegas."