Agreed. Interesting that I saw the ad and took a slight interest in it myself because of "aerobatics". Not interested in an RAA aircraft as I am only interested in aerobatics so my Plan B (post CASA medical if it comes to that) would be to get my flying "fix" in the USA. (refer the Sport Pilot provisions for aerobatics)
Quite a few - some personally seen, some on YouTube and others I've been told about. For those that I have observed personally I've never felt obliged to counsel the pilot regarding safety - his choice to operate illegally, I haven't yet seen anything directly hazardous to an individual (other than promoting illegal ops perhaps to others).
Competent - tick.Structurally capable - tick - being an aeronautical engineer I take a keen interest in this. I've flown aerobatics in a number of aircraft approved for aerobatics but for much less than the usual 6 G - Beagle Pup is only certified semi-aerobatic at 4.5G, Airtourer T-6 at its max gross weight is approved for aerobatics at 4.5G, Citabria is aerobatic at 5G, some models of Auster (who knows what the approved G is?), that homebuilt aeroplane I built which was approved for aerobatics purely on evidence of safe history of operation in the USA ...
Handling qualities - demonstrated capable - tick
Spinning - no unrecoverable spin modes and the recovery technique is known - tick
(hope I haven't forgotten anything - can't edit the post later)
May very well cause an engine stoppage, similar situation with a Cessna Aerobat, for example ....