There was a celebrated occasion when Paul Newman got so cross with AT&T Co that he gave out the number of his complimentary telephone credit card on television, enabling anyone who wrote it down to make calls all over the world on Ma Bell until the card was cancelled, but British Telecom has reportedly gone 200,000 times better: seems the company mailed its 200,000 credit card customers with new cards accompanied by super-secret Personal Identity Numbers and dire warnings that customers would be liable for any calls made using the numbers and included a reply-paid card to be mailed for more information – bearing the super-secret number…