WWW,
Unfortunate "incident", not quite sure what your angle on it is though?
I'm worried that there's a hint of "keep, or make sure, little aeroplanes stay out of big aeroplanes airspace".
Please accept my apologies if I'm wrong, and I hope I am, but that's what I read into it.
Unfortunately airspace incursions, just like level busts by the pro's, are a fact of life. Despite everything that is done to mitigate against either, we're human and they happen.
IMHO, attempting to ban light aircraft from CAS is not the answer, being more pro-active as an ATC service provider is.
WF.