While the below may be a bit too aggressive, here is how friendfinder/adultfriendfinder is handled by a popular hosts file
http://www.mvps.org/winhelp2002/hosts.txt
" # [FriendFinder Inc.]
127.0.0.1 adultfriendfinder.com #[McAfee.Cookie-Adultfriend]
127.0.0.1 ads.adultfriendfinder.com #[SpySweeper.Spy.Cookie][a841.x.akamai.net]
127.0.0.1 adserver.adultfriendfinder.com
127.0.0.1 banners.adultfriendfinder.com
127.0.0.1 cover9.adultfriendfinder.com
127.0.0.1 guest.adultfriendfinder.com
127.0.0.1 iframe.adultfriendfinder.com #[McAfee.Adware-Redalert]
127.0.0.1 option9.adultfriendfinder.com
127.0.0.1 tgp.adultfriendfinder.com #[cams.com]
127.0.0.1
http://www.adultfriendfinder.com #[Troj/Small-AG][Adware-Adroar.dll]
127.0.0.1 ads.alt.com
127.0.0.1 banners.alt.com
127.0.0.1 ads.asiafriendfinder.com
127.0.0.1 adserver.asiafriendfinder.com #[banners.friendfinder.com]
127.0.0.1 banners.asiafriendfinder.com
127.0.0.1
http://www.cyberzine.com #[PcTools.CamGirlsLive ToolBar]
127.0.0.1 ads.friendfinder.com #[a841.x.akamai.net]
127.0.0.1 banners.friendfinder.com
127.0.0.1 e89.friendfinder.com
127.0.0.1 ads.jewishfriendfinder.com
127.0.0.1 banners.gayfriendfinder.com
127.0.0.1 banners.germanfriendfinder.com
127.0.0.1 ads.outpersonals.com #[a841.x.akamai.net]
127.0.0.1 adserver.outpersonals.com #[banners.friendfinder.com]
127.0.0.1 banners.outpersonals.com
127.0.0.1 ads.passion.com #[a841.x.akamai.net]
127.0.0.1 adserver.passion.com
127.0.0.1 banner.passion.com
127.0.0.1 banners.passion.com
127.0.0.1 ads.seniorfriendfinder.com
127.0.0.1 adserver.seniorfriendfinder.com
127.0.0.1 banners.seniorfriendfinder.com "
and
" 127.0.0.1 banners.cams.com #[banners.adultfriendfinder.com] "
Got a suspicion that, not all, but many problems with friendfinder may be due to 3rd parties abusing both it and relevant affiliate programs.