Having seen the scanner guard demo, I was very sceptic that these are really necassary so I went into three banks plus two building societys, eveyone said that they have never heard of people having their cards scanned through pockets and handbags, I told one of the banks that I had heard that £40 scanners can be bought enabling this theft to take place, his answer was that if this practice was going on the whole country would be bankrupt, these crooks would be scanning every single person that they pass, making themselves billions, he also said if it was this easy to scan peoples cards the banks would be giving these scanner cards to all their customers. This all made sense to me.