Market of the WORLD - WORLD

Don't you think that people might start posting completely different content:
-they'll start posting short messages, just like in a chat (well... uh... basically... hi... and so on :))
-people will start writing EVERYTHING they think without any fear. This, in turn, will lead to the same conflicts!

Well, that's what moderators are for. And introduce warnings, like it's done on the Nival forum. There, it's done like this: you can get 100% warnings, and then the person automatically gets banned for a week (or a month), for example. The percentage of your warnings is displayed only to you next to each of your messages, so it's impossible not to notice. Usually, for the things you described (i.e., generating spam with short messages or insults...), the message is simply deleted, and +20% warning is added with a corresponding explanation in a private message about why. This system might seem harsh to some, but I assure you that after getting 40% warnings, you start thinking about a ban... when the warnings exceed 60% (I only had 40%, and that was because I didn't understand some of the rules, which I immediately learned once and for all), you start monitoring each of your messages...
In my opinion, it's an excellent system (Snow can tell you more after the events of patch 1.3 ;))