G'day Oskar,
Ofcourse, you are absolutly right, forgot that one :P I don't think it applies to this user though, I doubt he could be so reformed.
I know Skyring from a previous life (as an aside, I remember back when he wasn't quite so concerned about the posting of a third party's personal info!), and he's quite knowledgeable and has the ability to be a *great* contributor. 'Twould be a pity to lose much of what he has to say about politics or Australia.
He's also quite, quite mad, however, and the first time someone disagreed with him we'd undoubtedly see a return of the behaviour that led to the ArbCom ruling in the first place. This would only be exacerbated by his ban, and by the knowledge that we can't stop him if he really wants to disrupt Wikipedia.
Somehow (I know it's easy to say this as one who wasn't around at the time) we botched the Skyring case. I don't know what we could've done better (if anything), so this isn't meant as a criticism of ArbCom or admins, but what we did wasn't as useful as it should've been.