Users are then responsible for registering a single account with a valid email address, credit card details along with a billing address (alternatively, a valid Paypal ID).
That means you have to register with Forbes.com using a valid email address, allow me to DM you on Twitter or message you on Facebook (depending on how you choose to enter the contest).
Apple has emailed affected iMac owners who provided a valid email address during the product registration process to let them know about this program, but not everyone may have given an email address or their email address might have changed.
Even reputable news sites often only check that the e-mail address you have given is valid, but make no effort at all to verify that you are who you claim to be online.
Apart from its use in airports, there are other valid uses of face-recognition technology that you do not address, such as the sifting of application data for passports or visas.