Q: "What will prevent a thief from taking my phone, pointing it at my face, and running?"
A: "There are two mitigations: if you don't stare at your phone, it won't unlock. Also, if you grip the buttons on both sides of the phone when you hand it over, it will temporarily disable FaceID."
I didn't really find solace in Craig's answer to be honest. "Don't stare at it" isn't good enough, as that places responsibility on the victim to be conscious of their actions while a theft or confiscation is taking place. Most will try to get their phone back- likely, while looking at their phone in the other person's hands.
His second answer- using the buttons- also isn't good enough as it's a preventative action, but who knows when a theft or confiscation is going to occur? Once again placing responsibility back on the victim.
PS: I like FaceID, but Apple really needs to go back and think this one through. Maybe by using a TouchID built into the power button for future models.