You might want to keep this in mind for every online game out there too. It's pretty much the same rules in every game.Wow, that post is all over the place, but I get the gist.
The 10 commandments of online games.
1:Thou shalt not spread rumors on other players
2:Thou shalt not hack for anything (be it for personal gain, or for sharing with others)
3:Thou shalt not abuse of glitches
4:Thou shalt not kill steal (KS)
5:Thou shalt not harass others
6:Thou shalt not repeatedly attack weak players in PvP focused games (like Town-Defenses for example)
7:Thou shalt not be salty when losing, and salty when winning
8:Thou shalt not falsely report others (be it on purpose or not)
9:Thou shalt not ... uh... I forgot
10:Thou shalt not ignore the 9 previous commandments
Well. In short. Community rules in MapleStory should be the same around every other online games, unless it's a game mostly about co-op (like Warframe, or MOBAS).
In fact, if you complain too much that people didn't let you kill a target in MOBAS, you might be laughed at. And I said too much.
You can give a heads up that you need to kill targets to level up (or get currency if there is) yourself if you didn't level up enough during the first minutes of a match. But besides that, you better learn to let others kill your targets since it's a team-based game. And EVERY kill counts!
LoL, Smith, Paragon, DOTA2, Heroes of the Storm, and more! MUCH. MUCH! MORE!
Anyway, have fun~