Steve:
let me briefly respond to your points - but in reverse order.

FLARM is an active and useful accident avoidance device - albeit at a cost. Yet everybody still resisted making it mandatory. Although it is useful in the air to avoid collisions it has achieved less than 1% penetration into gliders operating and flights being conducted. Competition flying (where FLARM is well accepted now) is a microscopic subset of glider flying in the US and the accidents that you want to learn about are not happening for the most part in SSA sanctioned contests.

But your camera idea does not even qualify as an accident avoidance device - it's a post accident diagnostic device that might "possibly" assist in some types of accident investigations if it captures useful diagnostic information and if it survives the crash. And it also has a cost particularly if it is to be made crash-worthy. To use a silly illustration of the comparison with FLARM - it's the difference between Health insurance (that keeps you or gets you healthy) and private autopsy insurance (that tells others why you are dead). Of course nobody buys or sells autopsy insurance - there is little perceived value in it and the government does a generally acceptable job doing it free. The same will be true of your cameras and any attempt to make them mandatory: Little perceived value for the cost and the government does a generally acceptable job at accident investigation.

I also disagree that an electronic stream of GPS data points that requires an intermediary program to collate and present into what is essentially a cartoon presentation of the flight (like SeeYou) is the same type of invasion of privacy as a video which is immediately usable, publishable and understandable. Yes- we all fly with multiple GPS trackers but I retain the option (even in a SSA contest) of refusing to submit my flight log and accepting the penalty for that. And need I mention that none of the tracking devices I use carry the problem of being focused on the control stick area while I am fitting and using the catheter in flight? And if you say "OK - we can turn it off then" - you have just made it non mandatory and ruined your whole argument.

In the end Steve, your strongest argument is "We gotta do something." That maybe true and I respect the feeling - but it's not this mandatory camera idea that we should do.

All the best,
ROY