Once you move to the right of the fog stripe you burden yourself to have to ensure you can safely move back into traffic. That makes it a guessing game for everyone involved. I've only had issues when I ride close to the fog stripe and cars try to pass me in the same lane with oncoming traffic.

While I have had cars similarly passing me in the other lane, because they couldn't use the lane I was riding in the center of, they only caused issue to the oncoming traffic. And any wreck they may have had I'm sure I could have avoided. As those that pass me in those cases always had enough time and room to move over safely. They just chose not to because apparently they had no idea where I was once they lost sight of me with their own eyes. Or didn't really know how to judge my distance because of "objects in mirror are closer than they appear".

I've considered that there are possible circumstances that such events might cause me death or injury. But so far, riding the fog line has twice been a factor in two extremely close calls. And riding in the center of my lane when there are oncoming cars has caused me no issue to concern me of.

Of course my experience is circumstantial. However, I've seen no evidence other than opinion that either is safer.