"there is one thing that can get in the way of the ears and that is hair." Only ONE thing?

This system has two fatal flaws (not counting the millions of wasted tax dollars that will be thrown at L3 and friends). First, like fingerprints, you need a good picture of the ear of your subject to match it to.

Second, a scanner in a public place needs to see the subject’s ears. Hair is the least of their problems. When the sign goes up next to the airport door “ALL Sikh dastars, Muslim hajibs and burqas, and Arab Keffiyehs MUST be removed to enter, and Mr. OBL please pull up your turban so we can see your ears” there will of course be no outcry regarding cultural insensitivity. I am so sure they will all just say “Well, anything for security.”

At MCO the computer will explode when it sees hundreds of identical ears and concludes “OMG, the tewwowists have cloned an army of little people.”