This thread has been very enlightening and there have been many informative and sensible examples of how to use a camera.
In my case I have had one situation where there would have been a valid case for a camera. I was taken out by a car, knocked out and air lifted to hospital where I woke up. Of the scene, I could remember nothing, but the were plenty of witnesses and I was compensated in due course, so the absence of a camera was not significant. A few months after the accident, I got back to cycling with no real problems and no fear of traffic. I had no memory of the crash. My thoughts now are that if I had filmed the accident, I would have a permanent and continual reminder of what happened and I am not sure if I would have had the confidence to even get back on the bike.
A still darker thought I have, if the outcome had been a bit worse, my family would have been left with that permanent reminder and would have blamed me for riding too fast or without care and could deter future generations from taking up the sport.
So for the time being, I will remain camera free.
Happy Cycling
Keith