What this thing on this page is a modified hosts file, and It is freaking awesome http://www.mvps.org/winhelp2002/hosts.htm It has a bunch of websites on it that have been reported to be infected, and/or have malicious purposes. However next to them is 127.0.0.1 which is your loopback address. What this results in is your computer looking up itself when you try to access one of those said websites. Since the loopback address range merely loops back to itself, your computer never resolves the connection to these websites, and henceforth it never accesses them. They have instructions for various Windows Systems. For Linux, you need to download the text only version, copy all the lines with the websites on "there are a ton", and run sudo gedit /etc/hosts and paste them into the bottom of the /etc/hosts file and save it. Restart your web browser, and you'll notice that you won't see as many google ads, nor will you be able to access any website listed in the modified hosts file, and they won't be able to access you either. I use it in Linux and in Windows, and as soon as I figure out where the Hosts file is located in Mac OSX, I'll use it on there too. It's no replacement for a Anti-Virus utility, or a firewall, but it's a useful extra layer of security one way or the other. I thought I'd share it with you all, I apologize if you already use/know about it.