The way I look at it this feature could cause more of a faeces storm than simply pointing the finger. It might start all civil and stuff but how many times have we seen petty arguments and personal grudges turn really nasty. I still stand by my comment that this will cause more moderation headaches in the long run when people start using it for their own personal little wars.
I only engage in threads that I want to be involved in. After all a forum by definition is a place for free and open discussion. If people don't want to get involved in a thread or subject then they should simply not bother posting. I am a big boy and know what I am getting myself into with a debate.