Not just can they remove (or overlay) the big green thing to add on their own skimmer... once the presence of the big green anti-skimming device is normalised,

Not just can they remove (or overlay) the big green thing to add on their own skimmer... once the presence of the big green anti-skimming device is normalised, you can add big green skimmers to all the ATMs that don't have them yet: http://krebsonsecurity.com/2011/03/green-skimmers-skimming-green/ http://krebsonsecurity.com/2011/03/green-skimmers-skimming-g...