Interesting stuff even if we have hijacked the thread somewhat!
I'm not sure there is an aviation equivalent of a private off-road driving facility. Military ranges possibly?
Of course some of those who we set or set themselves over us do not take the reasonable view that consenting adults should be free to risk themselves. When I was riding motorbikes about ten years ago (I only stopped because I now spend my "toys" money elsewhere), there was a group of lunatics, I think originating in Sweden but having influence in Brussels, called Vision Zero whose attitude to road safety would completely destroyed any prospect of using a motorcycle. According to Wikipedia (so it must be right):
" Vision Zero is a road traffic safety project started in Sweden in 1997 which aims to achieve a highway system with no fatalities or serious injuries in road traffic. A core principle of the vision is that 'Life and health can never be exchanged for other benefits within the society' "
Bunch of idiots clearly but politicians and civil servants listen to them. Their website is here:
http://www.visionzeroinitiative.com/en/Concept/