story
This is the weakest justification I've heard out of all of them. How do you get a "do-over" for not realizing that weird new financial instruments are risky? And how does rolling back the risk make people more aware of risk? Anyone who was not aware of the risk the whole time deserves the most to lose their money.
The right time for the DAO to say "wait, guys, this is risky as hell and we have no idea what we're doing" and give back the money was before they lost the game they had created.
(The fact that you refer to this loss as their "smart" "contract" getting "hacked" indicates that you still don't want people to be aware of the risks.)