Lloyd Korn shuts down MapleStory hackers.

It's not ok to express yourself by shooting people and having their initials spell the message... It's not ok to spraypaint graffiti on everything...

"free speech" doesn't cover anything that harms other people or property. By impacting Nexon's available service hacks do just that and Nexon is justified in taking action against them.

Having guns as a form of expression is not illegal. Shooting people is. Shooting cans is not.

Writing code as a form of expression is not illegal. Using it for copyright infringement is. Using it for cheating in a single player game is not.

You want to come up with a better example?