Hopefully Nexon catches this quick.

Can't mass bannings take the place of a rollback? Seriously, people being turned into Phantoms is no cause for rollbacks but mesos are?

Mass banning is not enough for these type of exploits. In just 1 hour you can ruin the economy of the entire server by introducing billions of items/mesos. Those items/mesos will be involve in legit trades and from that it will just spread. Mass banning will do nothing.

Maybe hell-banning? ._.