Bob Eager burst on the scene, and said:


And in practice, in my nearest Costco (Thurrock, Essex) there are
plenty of 'riff raff'! They seem to qualify somehow...

Indeed. People 'borrow' legitimate users cards. Difficult for a company
like Costco to control that. Checking the validity of every customer
would take time and cost money, so prices would rise. It's also not
good for business if customers are routinely challenged in-store.

--
Michaelangelo
www.flickr.com/photos/mikenagel

Self-catering, holiday accommodation in the Scottish Highlands - for
disabled people:
www.woodhead-cottage.co.uk