I am not sure that's an entirely fair comparison, there's plenty of data on how dangerous asbestos is (if it's disturbed - lots of it is hanging around in walls

I am not sure that's an entirely fair comparison, there's plenty of data on how dangerous asbestos is (if it's disturbed - lots of it is hanging around in walls etc. and not causing trouble... yet...) CF is less well-studied, though of course we have lots of carbon compounds in our bodies, unlike scratchy silicates, which might suggest it should cause us less harm. But it'd be good to have the research to confirm that.