It&#x27;s a lot less resource intensive not to use a hosts file. This might not be a concern for people with modern machines, but having a hosts file with 12,000 lines in it does take a certain amount of processing.<p>If I might mention my own site for a minute, I maintain a list of ad server (and tracking server) hostnames: <a href="http:&#x2F;&#x2F;pgl.yoyo.org&#x2F;adservers&#x2F;" rel="nofollow">http:&#x2F;&#x2F;pgl.yoyo.org&#x2F;adservers&#x2F;</a><p>You can view the list as a dnsmasq config file, a BIND config file, and a bunch of other formats.