A valid concern, but a dishonest merchant can easily enough skim your credit card already. Ever since the proliferation of camera phones, it's not been hard for

A valid concern, but a dishonest merchant can easily enough skim your credit card already. Ever since the proliferation of camera phones, it's not been hard for a bad employee to instantly and stealthily copy your card's information. To step back a bit: I love how elegantly Square has adapted the market's current de facto e-payment option, but I have to wonder if that's really the way forward. If Square is really in it for the long haul, they'll probably do a Netflix: build a solid business on applying good UX to the current technology, then use that leverage to pioneer in the next paradigm.