I don't believe there is anything to worry about. I believe Raz is messing around with the advertisements and trying to make sure only appropriate ads show up on the forums. Ads are definitely annoying, but they're very important to gain revenue for the upkeep of the game and site. As long as you just x out of the tabs, nothing bad should happen to your computer. You could also go into chrome settings and disable pop-ups to see if that stops them from coming up. c: