Just like the convicted man in the other post who was convicted of converting imitation weapons in to working once, this chap must have a very good working knowledge of computers and could also have made a good living for himself legally.
So why do you suppose people do such things then? This chap like the one who converted imitation weapons is a highly skilled artisan who could earn good wages in a well respected trade in the community, but they and many like them end up, quite rightly, serving long prison sentences.
Their obvious talents are wasted in prison surely we can thing of something better to do with them, preferably something that would be a benefit to society but still be a punishment and a deterrent.
I agree with egapup. Instead of casigating him they should find ways in which he'll be useful to them. If he can hack into the most defended but sensitive computer systems in the world they could put his talents to good use.
"said he wanted to find evidence of UFOs he thought was being held by the US authorities, and to expose what he believed was a cover-up."
If everybody felt they had the right to hack into government computers every time they believed there was a cover-up the result would be chaos. It is alledged that this man altered and deleted files at a US naval air station not long after the 11 September attacks in 2001, rendering critical systems inoperable.
It's time people stopped portraying him as some kind of gentle, harmless geek, and started to understand exactly what he did. It's a serious offence, and he must have known it at the time, although his obvious intense interest in UFO's, and his conviction that there was a cover-up probably dominated his thoughts. An intensely focused interest in a specific subject is a common aspect of Asperger's.