A bit of thread drift follows. I agree with campfire. In real conversations, we often have to wait before someone else says something to comment. Even if we remember what we were going to say, when we finally get a turn, the conversation may have moved on and the comment wouldn't make any sense. Here, one person can say something not particularly relevant, and 20 people all have hours or days to get their comment in. There is nothing here to make us hold our "tongues" except our own judgement. (This also is not a complaint, just a thought about the nature of communication here.)