When you use the mark all forums read option on the index page (main page of the site) it updates all of the forum entries with your ID to the timestamp at that exact moment. This means that all posts in the database at that exact moment are listed as read.
It has nothing to do with what you have read or not.
Willful ignorance of science is not commendable. Refusing to learn the difference between a credible source and a shill is criminally stupid.
As someone who doesn't have access to cable or satelite, and only a set top box for the 'net, it's great to see the best recapper in the world (what does that do for your ego?) back and bring sunshine onto my life again. All together now: