I think a lot of people are missing the point. It isn't that chatter or a few friendly replies are a bad thing. A social atmosphere, even in the Marketplace is a nice thing.
For me there is a point of excessiveness, and it has been crossed a lot lately. It is one thing to be polite, friendly, or constructive. It is another to reply to every other post with a gremlin that doesn't even make sense half the time.
Sure a friendly post is good for bumping threads and creating interest, but most of us don't live on theses boards and I can guarantee that there have been sales lost by sellers just because I don't have time to wade through 100 pointless posts to see what has been listed or still available.
Some people need attention, I guess. Nothing new around here.