The Warbird AOC / system is VERY clear in fact.
This thread is not a memorial and we can all benefit from what is discussed.
Aside from the rules and choosing whether or not to follow them, promoting a safety culture amongst the industry is paramount amongst pilots. If you see someone doing the wrong thing, like flying without a medical, 'pri-mercial' flights etc, etc, speak to them about it and don't wait until something happens to vent your frustrations!
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Because the pilot held only a PPL, the ramifications from this accident will probably be felt throughout the entire war bird movement with resultant adverse and, in many cases, unwarranted publicity.
Despite his undoubted talent and flying ability, deliberately breaking rules (the law), causing potential risk to the war bird organisation and placing passengers in financial jeopardy (insurance?) should not be considered the actions of a "legend."