He posts too much without adding much of anything to the thread topics.
Here are some ideas I have to prevent him from ruining so many threads.
1) Junk Folder - for his off-topic and counterproductive posts
viewtopic.php?t=321
When he tries to derail threads from the actual topic to general talking points that have been discussed to death, it would really be better just to remove the posts rather than have people waste their time replying to this. The catch here is that I do not have the patience to read through all of his drivel. So I will request that people use the "report post" feature to alert me and fangers to his derails (especially if you are the thread author and feel the discussion is becoming bloated and not addressing the key points).
2) Nessie's greatest hits - this is a master list of Nessie's spam arguments
viewtopic.php?t=382
My hope is that with this here, people won't feel the need to keep responding to these points. Going forward I will consider most comments along these lines (e.g. "revisionists do not understand evidencing because they lack proper credentials") will be considered off-topic. Note this does not mean these topics like credentials are censored, just that we don't need to pollute every single thread with this.