the whole forum structure lends itself to its own demise. It encourages people who have absolutely nothing to say to spew random off the cuff nonsense.
You make a good point. I suppose people spew the ROTCN because they want higher post counts (or perhaps they just happen to be the perfect combination of stupid and bored).
Maybe a rating system something like Google's +1 scheme would work well in a forum like this. It would punish people who post a lot while contributing little, because they would have a poor +1 to post count ratio.