Some services use two-factor authentication already, Paramount+ and HBO Max do I know for a fact (and I think Hulu might). It won't stop too many people as if you are sharing, then you know the person anyway and can just ask, "hey, do you mind sending me the Netflix code?"Netflix announced they are going to use password verification popups to clamp down on people sharing accounts. I wonder if Disney, and the other new streamer services, will follow in step to stop
any theft of services.
Also, once you're signed in, they don't ask you for a password or anything again and of course no one ever signs out. So unless they plan on asking people who are already signed in to verify something upon every time they use the service, then I don't see this bothering too many people who are splitting accounts when the #1 reason people split accounts is to save money.