They were violating the terms of service of Steemit.com, but their account is unaffected on the blockchain and still visible through other interfaces :
https://github.com/steemit/condenser/pull/3153/commits/4d40cf0c08cd5a59255557b0f73d84bef4dc2b99
https://busy.org/@thedarkoverlord
https://steempeak.com/@thedarkoverlord
While I don't agree with TDO's methods, the documents released so far have been 100% legitimate and full of new information (EG: Flight 93 was shot down by the military) so I can't see it as a "scam".
Hopefully they continue posting to the Steem blockchain.
RE: [911 Hacks] Steemit account GONE