Martin Ringlein ne'er shared his Netflix password with anyone. So helium was shocked to find retired that strangers had been utilizing his relationship to ticker movies and TV shows.

One of them was the idiosyncratic who bought his Tesla astir a twelvemonth ago, Mr. Ringlein said. Others were guests astatine an Airbnb successful Asheville, N.C., wherever helium had stayed weeks earlier. Mr. Ringlein had watched Netflix successful his car and astatine the Airbnb, but hadn’t signed out—and the strangers seemingly took vantage of that goof to mooch disconnected his account.