Good God
Christ I just scanned through this thread but had to go back and read it from the beginning. Dare I ask whom half these 'aviation experts' are on this thread? Yes there are potentially down the line taxation liabilities but this is still a P91 operation whether the owner/crew/friends/mistress is on board. As long as there is no monetary gain for hire or reward I think the classification is pretty clear.
I have had a chance to meet some of the crew and these guys fly the arse of the thing and for all the reasons described in the official use of the aircraft.
Despite what people may think of O'Leary either personal or professional, sorry, the guys has done alright compared to a few!