Acting as a community means:
Follow the forum and game rules.- and just about the rest of what I'll put here is right there in those rules.
Be respectful to each other, but more importantly to the owners of the forum and their staff.
See something that is anti-social or a violation of the rules, report it. Moderators can't review every single post every single hour - often if one person is getting away with something and someone else is not, the first person just isn't being reported.
Be constructive. NOBODY has EVER been banned simply for disagreeing with the game's direction or a decision that was made. Everyone banned that I've seen was breaking one of the rules, in most cases more than once or egregiously. You don't have to even try to find thousands of examples of people disagreeing with decisions or not liking features and they're all still here.
I don't know of too many areas of life where you can act like a jerk while demanding things and get what you want. If you think the way to effect change is to be abusive and abrasive, you're going to be sorely disappointed (and you won't be posting here for long).