Costco's practice of insisting on presenting your membership card before even entering the check out line and then again upon exiting their 'warehouse' along with proof of receipt is, in my opinion, counterproductive to showing appreciation to valued customers and frankly could almost be viewed as discriminatory. It's like stereotyping all their customers as a bunch of thieves. I'll take my business elsewhere, where a feel more welcomed and like a valued customer after dropping my wad a cash. The only people who I believe appreciate this treatment are the two employees who get paid to do this asinine job!