One mans moderation is anothers interference I guess.
I think that by and large we end up with the forum we deserve. There was a time when you could come here on any given day and find a number of topical debates going on that were reasonably well behaved. Even when the Trolls got involved it was all fairly civilised.
These days you can't find any semi serious threads that haevn't been graffittied with pictures of kittens or someones @rse irrespective of the subject matter. I wouldn't say thats a moderation problem.
The result is very easy to see. The last post on this thread before me was made 36 hours ago, yet the thread was still on the front page of the forum. A couple of years ago it would have been halfway down page three by now.
In short an awful lot of people have either left or dont bother posting much now, and they haven't been replaced.
Some folks are very fond of saying "I'm not going to modify my behaviour, if you dont like it then leave". It seems that a lot of others are taking them at their word and doing precisiely that...