I'm glad that there are people giving this their attention and opinion. There is a time for force and there is a time for restraint- it is threat and risk analysis. This was a time for negotiation and restraint.
The guy will NEVER be allowed to fly again and I believe this is correct.
As for the charges.....wait and see. There is, at this stage, an "Unlawfully taking a motor vehicle" and most likely some type of "threatening" offence. The colour of right argument is correct.....he did not have colour of right and therefore no authority to take this a/c.
Let's not try and crack a wallnut with a sledgehammer....