I am using FireFox browser. Their web site states:
Do Not Track is a step toward putting you in control of the way your information is collected and used online. Do Not Track is a feature in Firefox that allows you to let a website know you would like to opt-out of third-party tracking for purposes including behavioral advertising. It does this by transmitting a Do Not Track HTTP header every time your data is requested from the Web.
You will still see ads with Do Not Track enabled. However, Do Not Track may change the type of ads you see. For example, behavioral ads are targeted to your interests based on the websites you visit and the search terms you use. If you request that websites Do Not Track you, and the sites respect your privacy preferences, you will see more generic ads in place of behavioral ads.
https://www.mozilla.org/en-US/firefox/dnt/
Companies are starting to support Do Not Track, but you may not notice any changes initially. We are actively working with companies that have started to implement Do Not Track, with others who have committed to doing so soon.
The Do-Not-Track feature, as far as I can tell, disables web sites from storing and retrieving cookies. I do not believe the old HG.org site used cookies in the way that this new site does. Obviously, you (SG) are not privy to these cookies or the information that they are gathering. As I believe you stated before, this is a WordPress forum, so WP is most likely implementing these cookies.