I just figured out a symptom. If you're on a new computer that hasn't visited VBForums before, you get the popup. But, once you click 'Block', the popup goes away for good. I guess it sets a cookie or something once you block. But still, I did some research and this is something that Google Chrome allows, but on VBForums is the only time I've ever seen it, and it seems strange that VBForums needs to snoop around on my LAN.