Maintenance?

Yeah, most people fail to grasp the severity of what happened. Nexon can't just "bandaid" this one, or they'd lose 90% of players. They must fix this, and fix it right.

Those hackers just ripped a huge hole in the game. They were using GM functions, accessing character data, and a whole host of other things that are very serious. Nexon basically lost control of the game, lost it to some idiot script kiddies.

Nexon is/will be shaken to their core. They've just been embarrassed in a blatently obvious way, their security proven laughably inadequit. All pervious exploits (ex duping) were fairly unnoticable, as they only affected one player and it was fairly technical to understand. This one, however, well you've seen how people reacted.

This is major. It goes beyond a personal advantage. Whoever's responsible did this purely to hurt players and the game. They were obvious about what they were doing. They also knew that they can't enjoy the fruits of their labor. They'll be banned/rolled back when mabi comes up. They did this just to make a statement to Nexon and the players, that, in effect, says "You're not in control, we are."

Nexon did the right thing by pulling the plug on the servers. If the hackers got this far, who knows what else they could do/have done? This is all what Nexon must investigate and fix.

Honestly, I'll be very surprised if its less than a week.