I used to enjoy internet discussions - back in the early 90's when the bar to entry was at least a 105-110 IQ. Now that everyone can "discuss" it becomes obvious that the roughly 23-25% of humanity who are idiots have roughly 75% more time and willingness to post than anyone else which drives the bulk of the sensible posters away and it spirals downwards from there.
The concept of free and open discussion is a failed concept. There need to be bars to entry in order to prevent the 25% from taking up 90% of a forum's bandwidth. I am sure that you have noticed that on any given forum the most prolific posters are inevitably the worst posters - driving other far more informed and interesting posters away? It could be something as simple as requiring a credit card and a $2 fee to participate. When you troll, flame,spam or repeatedly say something incredibly, undeniably stupid than you and your card is banned. There are only so many $2 fees and so many credit cards that someone can reasonably obtain. Additionally how about limiting the posting privileges of both the newest AND THE MOST PROLIFIC contributors so that one person can not dominate a discussion.
I know , I know - cue the rallying cry of "freeze peach!" once again and those are the posters that I am talking about.