If you buy an account you should (actually must) post an address to proove you're the new owner of the account.
Why and where? There maybe reasons for not posting one.
At least that's what I do.
What you do is good but some users only post when they are forced to like when joining camapigns, giveaways, asking for loan etc...
But this ban evader didn't do that.
This isn't *must* and how is he a "ban evader" if that account is sold?
Also he kept the bitcoin address on his profile
Why the hell you do that?
Not all do it. The account was sold under a certain conditions. The buyer still has to pay a some more. So the account details will stay the same untill it has been paid in full.
1) To make it less obvious of a change in ownership
2) There isn’t a huge point in changing it
-MZ