We call on Square to do the responsible thing and recall these card skimming devices from the market.
In other words, "Please don't decentralize payment processing using this simple add on to one of the world's most popular smartphones! We haven't figured out NFC yet!"
In the mean time, "be secure now" and sign up for VeriFone's PAYware Mobile service!
Also, notice the URL of one of their links under "Card Skimming in the News": http://www.sq-skim.com/www.spva.org
Way to go, guys.