What can Nexon do to prevent hacks or make the game less vulnerable to exploitation?

Absolutely nothing. There's nothing they can do, really aside deal with things case-by-case. So long as it exists, someone will hack it. And with Maplestory having the hacking community that it does, the game is always going to come under seige. They'll always find a way.

keeps things from getting boring, stir the dramapot