How do you deal with rude players on Maple?

I like making fun of them. If I'm training, besides a few insults every once in a while, I don't respond to anything they say and keep training.

I'm nice to people for the first two minutes they're on my map unless it's obvious what they want.

You pick at them and drive them out with jackass-ery. Seriously. Pick at one thing about them, and don't shut up about it. Beat them at their own game.

One time during the 2007 anniversary event, I ended up calling two people Hitler... yeah, that was the only time I went that far. Usually, I just ignore them or strike back more intelligently... although this is maple we're talking about so that doesn't always work.

Being nice works. [Incredibly well, in fact.]
If you have a girl character, it works twice as well.
If you have a thoroughly NX'd girl character, even better.

I smite them.

If they are KSing me for no reason, I usually just KS them back. If I can't I usually just walk away. Pixel-drama is so pointless.

KS them until they know who's boss. (Me)

Tell them to stop being a dumbass and move out of my way.