Charles Sigwalt walked past doorbell cameras at the homes of friends and family in Virginia. He never gave permission for any of it. Yet those devices captured his face. They stored it. And they did so using Amazon’s facial recognition technology. Now Sigwalt is the lead plaintiff in a proposed class-action lawsuit filed Monday in federal court in Seattle. The suit accuses Amazon of privacy violations through Ring’s “Familiar Faces” feature. It seeks at least $5 million in damages. And it claims millions of other Americans have suffered the same fate. “Those affected did not consent to have their privacy rights violated at the entrance way,” the complaint states. Millions of other Americans passed by a Ring security camera and unknowingly had their facial recognition information collected. Short. Direct. And central to the case. The feature works like this. Ring customers can opt in. The system then uses artificial intelligence to learn and remember the faces of people who frequently appear.…