I've actually had two different credit cards defrauded, both with the Halifax. On each occasion, they refunded the money immediately, rather than making me wait for a string of procedures to take place, which I was quite impressed about. I have never had my card declined when making a purchase, but they always ring about an hour later, if the purchase is over a certain amount.
I wonder if people are slightly complacent, knowing that they will get their money back if their card is defrauded, and as a result, are not being sufficiently security conscious? I know it makes me feel safer shopping online, knowing that I am protected, but I am still very careful where I use my card, because of the hassle of having to cancel it, in the event of a suspected fraud, with online orders pending.