For now they still have trouble staying in their lane, I don't see any lack of reasons to pull them over, in fact I'd love to see them taken off the roads entirely until such bugs have been ironed out. Public roads are not the place to beta test software.
Yes, but 'where there are clear lane lines' is exactly the problem. I know plenty of places where there are no clear lane lines. If every one of those is an accident waiting to happen then we first should invest in some kind of minimal level road markings. And even then you'll have plenty of exceptions.
