A hardfork of Nxt would make it seem like just another, failed crypto-currency that could not withhold a hack on a centralized entity. What you are proposing is killing Nxt's future and it won't get us anywhere near the place you want it to be.
That is well debatable. The community is fully divided on that. Saying such as being a sure thing is foolish.
In my opinion the solution to block hacker's account only through a hard fork is a sign of exceptional communal resolve. It's not a rollback. It is a collaborative action that mitigates damage done by a malevolent party. The effect to NXT users is only beneficial. The effect to outside observers is mixed and not prominent. Do not let fear take you over and prevent you from taking action when it needs to be taken.
50m Nxt flooding the markets are very unlikely.
Not flooding but exerting incredible downward pressure during the next 3, 6 or even 12 months. It is nearly certain. The hacker will of course sell it to a private dark side investor who mixes it, cashes out some, and sells the rest forward to the next investor for a fraction of the market price. Rinse and repeat until done.
1.5 million USD extra injection to the buy side would not suffice to keep NXT afloat, because of the bad rep causing more sell pressure.
By blocking the 50M from being sold, we just have to deal with the bad rep and not the massive selling million after million until exhaustion.
So where is the line when you say: we freeze that account?
Is it when 20 million gets stolen? 10 million? 100 thousand? Who needs to cry wolf to get people to freeze "account X"?
Do we need everyone to be affected by the theft? 1000 people? 100 people? 10?
It's a VERY slippery slope Graviton... Very. (besides you wanting to use CUSTOMER deposits, which aren't yours!)
I dont remember any exchange and certainly not DGEX, ever saying they wont forge. It is common for banks to earn interest on customer deposits? I think they do a lot more than just earn interest (fractional reserve lending!), so on this issue regardless of the politics, the "possession in 90% of the law" seems to apply.
Whoever has access to the funds gets to decide what to do with it, eg. forge or not, which version or not.
Of course, if DGEX wants to reflect the will of his customers, he could setup a vote, weighed by the amount in their accounts and forge proportionally to each block. That is the math based way to defuse the politics around this
James