If you don't use AdultFriendFinder then you can just block a bunch of sites in your hosts file to block it.
I've been using hosts files since I can remember to block out most malware sites, adware, stupid dating sites, and ads. It's rather simple and very good to do so.
You can get it from
MVPS hosts by downloading the
hosts.zip file, extracting it, and running the MVPS, right clicking the MVPS.bat and running it as administrator.
What that will do is block a lot of "bad sites" on your machine by redirecting them to your local host. You can see a list of sites by clicking
here.
My setup is:
Windows 7 x64, Comodo firewall (I use the old one because they fucked up the GUI on new one), Microsoft Security essentials, Malwarebytes, VPN, modded hosts files, Firefox with Adblock Plus and Flash block.