I'm pretty sure it's a genuine address, I checked it in an explorer. And I don't think it's an advertisement for the forum; it's only mentioned once. And Bitcointalk is discussed as well.
The wallet mentioned is genuine and the bulk number of coins moved into the wallet around the Mt Gox era and the wallet is still active and getting dust amount for a long time and the recent one was this August.
There is an
old thread in speculation that mentions this address
How can one be so sure that it's for that wallet, though? Just because it's posted like that? It can be a prank or something.
As mentioned in the article it is possible that scammers are trying to sell the DAT file editing to look like the hot wallet.