Funnily enough the hacker says hes done nothing wrong, and that rolling back the eth chain would be illegal.
http://www.altcointoday.com/self-proclaimed-dao-attacker-cautions-against-hard-fork-deployment/The tweet in question stated:
I have carefully examined the code of the DAO and decided to participate after finding the feature is rewarded with additional ether. I have made use of this feature and have rightfully claimed 3,641,694 ether, and would like to thank the DAO for this reward. It is my understanding that the DAO code contains this feature to promote decentralization and encourage the creation of child DAOs.
I am disappointed by those who are characterizing the use of this intentional feature as theft. I am making use of this explicitly coded feature as per the smart contract terms and my law firm has advised me that my action is fully compliant with United States criminal and tort law. For reference please review the terms of the DAO:
Academic Emin Gün Sirer, who called for a moratorium on DAO activity when he co-discovered issues with its code last month, told CoinDesk hes not sure if Tual is correct that The DAO is certainly closing.