I didn't read the entire thread due to a lack of time, but I wanted to weigh in.
30 years ago I used to work on rebuilding sterilizers in hospitals. They were all coated with asbestos as thermal insulation. One of my jobs was to cut and remove it to allow access to the pipes and wires for the other guys. I used a circular saw and worked without a mask since I had a beard and it wouldn't have worked anyway. I inhaled a LOT of asbestos dust over the course of about 5 years.
When the big scare hit, I was fraught with anxiety. My employer had gone belly up and died, there was no recourse for me anywhere. I had a lot of discussions with any doctor who would listen. Most said "We have no idea how much exposure is / was dangerous." What they were doing was covering their asses because people were suing EVERYONE involved. Finally I attended a seminar put on by a lawyer who wanted to find clients to latch on to and go after deep pockets. I explained my situation to him, he sent me to HIS doctor, the one he used in trials. This guy was as honest as the day is long, at least to me anyway. He told me that the real danger was to people who worked IN THE ASBESTOS FACTORIES and their wives who would wash their clothes every day for 25 years or so. People who come in to casual contact for short periods of time MIGHT develop mesothelioma, but more likely they will die of something else first, such as old age!
It's been 30 years, I have no signs or symptoms (at least not yet). I am now grateful that I didn't spend those 30 years stewing and fretting about this issue.