If it's decided by a weighted vote in accordance with how much XC you own, a rollback would never happen.
Lots of the people who kept funds on the exchange would have taken a big hit to their XC reducing their voting power. And the majority of people who were unaffected (50%+) will never vote for the rollback.
Come From Beyond (NXT dev) tried to be subtle with his phrasing but he was pushing for a rollback imo. But the NXT votes via forging were massively against it. I own >1% of NXT and in my position where I could lose a lot of money, would rather see the price take a hit from panic and the thief dumping, then NXT losing all integrity and going on a death spiral and forever suffering FUD.
This is one reason why I think if we ever implement a voting system, the votes are weighted by the amount of XC you own (disclaimer - I own a lot, but I would honestly advance this viewpoint regardless. The same way I was against the Vericoin rollback and posting my thoughts without owning any).
This should be a decision the devs make, before there is an attack on xc. Having a weighted vote means centralized control over xcurrency. I personally don't want the wealthiest xc investors making decisions that will affect me financially. If people lose they're xc on exchanges they should be on their own.
Really though it's the only way to do it. If XC votes were equal, what's to stop someone with twice as much XC as you splitting his XC in half and voting twice?
A weighted vote is not centralised.
Logically, the more of XC someone owns, the greater say they should have as they are more affected by the voting outcome.
Additionally, if the vote wasn't weighted, the very example we are talking about could see a rollback executed (lots and lots of small fish on a big exchange).
The good news is the consensus in here is not to do a rollback so this XC voting discussion is moot. Perhaps Dan can go on record now and say no rollbacks will happen under any circumstances whilst the source code is closed and under his control. That would stop any future disagreements if Mintpal was hacked (because suddenly a lot of people would say they want a rollback
)
p.s. to anyone new to the topic reading about rollbacks, there has been
no XC hacks. It's a hypothetical discussion.