Any forum is only as strong as its contributors. If a topic you wish to discuss has not be raised then start a thread about it. The thread will live or die based on the level of interest in that topic. If you see a thread on a topic you are not interested or you think has been done to death don't read it. Over to you....
I will add to that by saying if you do read a differing opinion and you want to comment, don't do so with the mindset of "this ****** dunt agree with me - I'm going to put him/her in their place".