I know admin has their own policies regarding banning members, but I thought I'd throw in my two cents here.
I'm really hoping that in some future day when JU has "pay" features, premium users can choose whether to allow/disallow banned members access to their pages. I don't know the admin's criteria for reinstatement; frankly that's a matter between them and the offending member, but I do know that there are banned users whose input I would generally prefer to have on my page (and whom I would prefer to blacklist myself if I didn't want them on my page).
Yes, I'm speaking specifically of Myrrander, but no, I won't write a "Free Myrrander!" blog, because, essentially, it does no good. It's an admin decision, but I do want my two cents on the matter weighed in (frankly, I don't know ALL the reasons for his banning in the first place, but nonetheless, would prefer to see him in a position to directly respond to my articles). Sometimes, it doesn't seem the same without certain bloggers.