What Every Mapler Should Know

You know I was going to keep my mouth shut but when I logged in it forced me to come here so, enjoy.

This isn't a bad idea, but it suffers from tl;dr. If the point of the thread is to educate the ignorant it has to be in a format they will digest. Combine similar points:

GMs are Not Developers
A GM is generally an entry-level employee who sits at a desk all day doing shifts of one of two things: patrolling in game to deal with suspicious activity, and responding to tickets by searching an online knowledge base for what the approved resolution for the nearest possible match is, and closing the tickets with that answer. Most of their answers are copy pasted because they have no ability to do much else. A good chunk of their answers are wrong because they don't understand what your issue is and/or don't have a knowledge article to address it in the way they tried looking for it or the way you phrased it. A GM has no control over the actual game code or the hardware. See #4.
Hime Has No Power
She's effectively a desk clerk in charge of the company newsletters. She writes up Notices to say what she's been told to say. She collects user feedback and passes it on to superiors who mostly don't care. She herself has no more power than your average word processor. It's not her fault she can't get things done; she's just in a really crappy job whose main purpose is to be the name to attach to the hatred when things don't go your way.

Along with #4, just stating Nexam is useless.

I'd recommend dropping the points that, even if true, present irrelevant information. For example

Nexon Corporate Headquarters is Tokyo, Japan
We don't know why, either, but for some reason they decided to move there for operational purposes. This may be due to them having picked Tokyo's stock market as the best place to release their IPO, or it may have been for tax reasons, or any other number of possibilities.

Who cares? Does them being in Tokyo affect anything? Aside from that asinine thread about suing Nexon, this fact bears no relevance on any discussion I can think of. And even in that thread it's not like this factoid would've made a difference.

You can also save space by refraining from moralizing:

"Glitch" vs "Hack"
A glitch is a naturally occurring error in the game. This can be due to a misconfiguration of the client or the server. A glitch can be positive or negative. An example positive glitch would be bigfoot having been poisonable originally. This was a mistake that meant he could be killed quite easily for large amounts of experience. A negative glitch example would be when phantom forest first came out and was missing a ladder. Anyone who entered the map would crash and be unable to get back in. Exploiting a positive glitch is a form of abuse. It doesn't matter that it's Nexon's fault it's doable. It's your responsibility to know better than to do it.

A hack is when someone uses a third party tool to modify the way the game works. This can be editing a WZ file to change how it behaves, using a packet editor to send commands to the server that the client itself would not normally send, injecting a dll into the client to rewrite how it behaves or any number of similar things. Regardless of why they're done, they're all against the terms of service and they're all wrong.

It could be argued that there's a third version; Modding. Modding is when you use a tool to edit the physical appearance of the game, not the actual gameplay. Some example usages of this would be changing the dictionary to make it clearer which items are which by name, or editing the sprites on certain mobs/objects to make them stand out more from each other, or changing your character's appearance. Or making meteor rain flaming sheep from the sky. The results of honest modding are only visible on your own machine, and while mostly considered "legit", is still a form of hacking and against the TOS.

Aside from saying what a glitch vs a hack is, there's not much that needs to be here. Making statements about the community seems rather shortsighted when norms change with whatever exploits Nexon happened to leave in this week. I recommend refraining from referencing the TOS at all in this thread. Unless you'd like to make points 426 and 427 detailing the (also unenforced) minutia of other TOS terms.

If it's too good to be true, you should not trust it.
Nexon has said this repeatedly. If you do something they consider abuse it doesn't matter who got away with it, it doesn't matter who else did it. If they think you should be punished for it and are certain you did it, you'll pay the price and depending on how moody they are at the time the severity can vary wildly. Pay attention, use your head, and be prepared to defend anything you do. "I didn't know it was wrong" is seldom a valid excuse.
"It's just a game".
While true, the point of a game is to have fun. People who go out of their way to ruin the fun of a game for other people as their own way of having fun are known as griefers. They're a miserable excuse of a player who should really find a different hobby.

Drop entirely. Replace with "Use Common Sense" or something similarly brief if you insist.