Rather than agonising over how we could make private aviation more secure, perhaps we should spend some time considering if we sensibly need to. The reason I used the microlight analogy earlier was to give a clue to the scale of the perceived problem The whole point of microlighting was that anyone with at least part of a brain could do it and it was simple and inexpensive. A microlight can also launch from any flatish, levelish field slightly bigger than a football pitch. How many fields are there like that in these fair Isles? How safe can we sensibly make that without killing it as an activity?
As I also said earlier, these ill thought out and over valued threats are music to the policeman mentality. If we are worried that the general population will be worried and take it seriously, it is perhaps up to us as fellow members of the general population to expose it for what it is. It could so easily be ridiculed in the form of a Goon Show plot.
If the freedoms we have now are further curtailed or rendered tedious through over regulation, the terrs have won yet again.