Okay, so if I were to roll back the dump, Poloniex would be short about 80 BTC...
As I don't think he has the XCP to cover the dump, ...
Since this was a bug in the protocol that could have affected anyone, it does not seem fair that Poloniex or its users should take the hit.
Since we are still in "Alpha", why not release a new version of the protocol, that issues another 35K XCP as the solution?
It would essentially be a 1% tax on everyone who holds XCP, through inflation. It seems like a small price to pay for finding out about this huge, show stopping bug (that could have gone unnoticed & exploited for months!)
I think its a terrible idea. Two wrongs don't make a right.
This will also encourage hackers to loot what they want knowing that the breach will be filled from thin air by the protocol. It diminishes the value of the protocol and undermines consumer confidence.
We must also wait for the busoni to report back what the hacker has in mind before we formulate the best way forward. If he does not return the BTC, short of raising funds for the Poloniex loss there is nothing else we can do. The bounty people planned for the "benevolent" hacker must go to Poloniex even though it may not fully mitigate Busoni's loss.