So why didn't you make it clear that the purpose of your post was to voice your disapproval of Wal-Mart (and, I'm feeling, anyone who's shopped there), rather than making it sound as though Costco isn't a warehouse club? It is, and is therefore exactly like Sam's Club in that respect.
I should have been more clear with my post. I didn't mean to say I thought Sam's Club has any affiliation with, or conducts business in the same was as Costco. Nor was I endorsing all the ways in which Sam's does business. All I meant was that Sam's Club is a warehouse club, as I assumed Costco is. I didn't mean to strike a nerve in terms of fair business practices, and if there was a Costco closer to 100 miles from me, I'd shop there.