I got into a bit of an argument on FFXIV yesterday. There were a couple of people having a random conversation in general chat (or shout, which is FFXIV's zone channel). Then a third person, Octavia, got upset with those two, and told them that general chat was for people to find groups and sell stuff. Octavia said that the other two were "making general chat like that of WoW".
I felt that was incorrect. I don't want to see general chat to be a list of "LFG, LFG, LFG, WTS". I like seeing random conversations.
But then again, random conversations often make LFG messages disappear if people are talking a lot. That can be frustrating to someone who is looking for a group. Also, conversations that touch on hot topics such as politics and religion are annoying. Seeing variations of "Trudeau/Harper is a meanie" makes me want to turn off general chat.
That's not even to mention getting into barrens chat and the Chuck Norris or even less savory spam.
I don't know. Trying to restrict conversation, to move the conversational norms to just WTS and LFG seems excessive to me. At the same time, I see the attraction of it.
 In some alternate universe where Canadian politics is debated in MMO chat.