Dodgy's right, the account can be found in a search, so it's not
disabled (as I found out as soon as I'd made the post, but I couldn't add to it as it was going through moderation). And as you quite rightly said, he is still playing. It has
to be something wrong in WGT's database for that player.
I was going to suggest that he has no blogs or activity history, but I think the account page would still have the headings, so scratch that!