Well apperantly you can, but no one has done it so far, as no one has gotten the badge of completion.
I'm at 90%, but all the categories have 10%, so I can either get another 10% in a new category (which isn't there) or boost up a few others to 12 or 13 to finally reach 100%. And I'm too lazy to look for anything that's not done. :3
I've mentioned this a few minutes ago: 2.0 was diabolically designed to be addicting.
I'll control myself, though.
Tag (Courtesy of Fkusumot) "If I'm posting in this thread then it's probally a spam thread."