> 2) Is it a great idea to broadcast someone's card numbers so clearly? The graphic is so obviously a credit card, it would be easy for any onlooker to spot and steal.

yes - anything that signposts card data clearly to an onlooker is problematic, but any malicious shoulder surfer will probably be able to spot a payment page a mile off in any case. This might however, have a small possibility of encouraging opportunistic theft.

I think the bigger threat to this probably comes from the networks (MC, VISA, AMEX etc) who get VERY possessive about mock-ups / card image facsimiles that use their logos. The brand logo protection that they enforce is pretty strict and I would imagine this approach would not be welcomed. I'd like to be wrong, but my experience with the networks makes me pessimistic.