Its already been said that having it read only would only cause problems as those who can't post in the Issues forum taking the discussion to other areas of the site.
This is one thing that I have always wondered, to people actually go back and read the pages before in the thread, before they actually make a post? I always try and do it where possible to actually know what has been going on and to see if someone has posted the idea a few pages before more. Obviously I don't go the whole way back through the thread if it is a massive one, but if it's only been a few pages I always try and read back and contextualize myself.
I have seen a lot of people not to do it and it just seems a bit ignorant, especially in Yudi's case, where unless he actually knew the idea before and was backing it up, seems quite stupid.