Australia's Department of Home Affairs says it wants to use facial recognition technology to limit children's access to online pornography. Those who want to watch porn would have their faces scanned and matched to the photos on their official IDs to show they are adults. Critics say this would allow the government to know every porn site someone goes to. In fact, the Home Affairs office would like to use facial recognition for a number of purposes. But so far, Parliament hasn't approved the creation of the biometric database needed for widespread use of facial recognition technology.