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.
Space has now been made for you to add your Twitter username to your profile. SO! Go edit your profile! Right now it's only in the profile page. I'm not sure if we're going to add it to thread/post displays or not - I'm leaning towards not.