If I had been on a forum like the BBS for nine years I think my posting habits would slow a hell of a lot. We regular users get pissed at repeat topics all the time, but imagine seeing the same topics every day for nine years? I wouldnt fancy posting my opinion on something repeatedly year after year.
That would just get frustrating. I remember using Newgrounds when I was a wee lad back in like 2000, never bothered signing up because I thought forums were gay or stupid or something. I just wanted to play violent games, and watch stupid cartoons. If I had signed up then to post on the BBS I doubt I'd still be here.