Steve McQueen and Warren Zevon both died of mesothelioma. Its only known cause is exposure to asbestos. Both had worked with asbestos at blue-collar jobs, early in their careers.
I think they were right about relative danger. We had asbestos siding put on the house when I was a kid. As I understand it, the danger comes when bits of asbestos are air borne and you breath them in.
asbestos siding