I don't understand - won't this process fail when the person signs up for "jameshfisher+netflix@gmail.com"? Netflix will send a confirmation email to the real

I don't understand - won't this process fail when the person signs up for "jameshfisher+netflix@gmail.com"? Netflix will send a confirmation email to the real jameshfisher@gmail.com, and not confirm it, and so Netflix won't create the account. Things stop at this point.