A Florida school admits that it made several mistakes when it allowed a security company to install iris scanners without telling parents -- and without even having a contract with the company. The eyes have it? Or the eyes were had? (Credit: Screenshot by Chris Matyszczyk/CNET) There's a quaint concept that seemingly every technology company dismisses as outdated. It's called opting in. Should you not be familiar with it, it's the notion that you ought to choose before, say, all the people in your address book are contacted by a company they've never heard of. And wouldn't it be lovely...