Earlier quoted context omitted.
You’re in their store. If you don’t want to follow their rules, don’t enter their store.
Ownership changes at the point of sale. At the time they do the check, they no longer have any legal basis for preventing the customer from leaving. Costco and Sam's Club can only get away with it because they can revoke membership for non-compliance. At Fry's, stopping someone for a search risks civil suit for kidnapping. Aside from that, it's a security theater tactic to discourage shoplifting, which also happens t…
Other stores don't have the processes for it, but legally they could bar you from return visits to their properties.