When TF is implemented (scheduled in a few months), rogue forgers will have to gather 90% of forging power and they would be able to rewrite only the last 10 blocks.
BTER get hacked and lose a bunch of NXT. Crypti price gets creamed. BTC withdrawals from BTER are frozen.
People are arguing about whether to roll back or not (probably only a few serious minds really know the answer to this based on the NXT code even though everyone seems to have an opinion about it).
A large investor threatens to sue everyone on planet earth before sending them to jail.
Interesting stuff. Question: If it is correct to say that there are checkpoints in the NXT blockchain, would it be possible and in that event would it make sense to unravel the fraudulent transaction whilst leaving legitimate transactions intact or is this an oversimplification?
It will be possible if 51% of forging power is sent to forge on the new chain, the longest chain wins. Only forgers (stakeholders who forge) decide whether to mine on the old chain or to join the new chain.