The majority of fixed wing accidents in Oz involving lighties and "warbirds" are caused by pilot error - a lot are weather related and most of the others are because the pilot has got outside of his capability box re aircraft handling. Invariably the pilot is described by his peers/family/friends as extremely careful/"professional" (wtftm) etc - crap! Yes I've met a number of PPL holders (I was one once - it frightens me now years later how much I didn't know) who clearly know their limits but I've met others who are accidents waiting to happen. Before someone can own/operate a high performance (any ex-mil jet) aircraft that person should demonstrate that he has a lot more going for him than just the funds to acquire it.
I would add that CAA/CASA et al probably don't want to know until the day someone ploughs into the middle of an airshow crowd.
GAGS
E86