Sarah Perez, TechCrunch:

YouTube on Tuesday announced it’s beginning to roll out age-estimation technology in the U.S. to identify teen users in order to provide a more age-appropriate experience. The company says it will use a variety of signals to determine the users’ possible age, regardless of what the user entered as their birthday when they signed up for an account.

Well-intentioned though I think this is, it still feels more than a little dystopian.