Sod all the other security measures.
Just send me a text when a transaction occurs on my account. I'll be able to tell you IN SECONDS that it's fraudulent.
Like my Italian girlfriend's entire family and friends have whenever they have a transaction occur. Her dad was worried because when buying something for us in B&Q once, his phone beeped twice while we were still at the checkout and he was able to tell the girl (via a translator) that she'd double-charged him for the goods. It was THAT quick, even internationally.
Prevention might be better than the cure, but we clearly can't prevent and a rapid diagnosis will catch more than sheer ignorance ever would.
Anyone know a SINGLE UK bank that offers this? They can have my current account in a heartbeat.