Fight Referrer Spam with .htaccess

Simply throw in this codes:

SetEnvIfNoCase Referer blackhatworth.com spam=yes
SetEnvIfNoCase Referer http://blackhatworth.com/marketing/lounge/730430-apple-com-analytics-referral-traffic.html.com spam=yes
SetEnvIfNoCase User-Agent blackhatworth.com spam=yes
SetEnvIfNoCase User-Agent blackhatworth.com/marketing/lounge/730430-apple-com-analytics-referral-traffic.html spam=yes
SetEnvIfNoCase Referer priceg.com spam=yes
SetEnvIfNoCase Referer hulfingtonpost.com spam=yes
SetEnvIfNoCase Referer semalt.com spam=yes
SetEnvIfNoCase Referer bestwebsitesawards.com spam=yes
SetEnvIfNoCase Referer cenoval.ru spam=yes
SetEnvIfNoCase Referer buttons-for-website.com spam=yes
SetEnvIfNoCase Referer darodar.com spam=yes
SetEnvIfNoCase Referer o-o-6-o-o.com spam=yes
SetEnvIfNoCase Referer simple-share-buttons.com spam=yes
SetEnvIfNoCase Referer lomb.co spam=yes
SetEnvIfNoCase Referer lombia.co spam=yes
SetEnvIfNoCase Referer econom.co spam=yes
SetEnvIfNoCase Referer kambasoft.com spam=yes
SetEnvIfNoCase Referer lumb.co spam=yes
SetEnvIfNoCase Referer 7makemoneyonline.com spam=yes
SetEnvIfNoCase Referer ranksonic.info spam=yes
SetEnvIfNoCase Referer savetubevideo.info spam=yes
SetEnvIfNoCase Referer see-your-website-here.com spam=yes
SetEnvIfNoCase Referer ranksonic.info spam=yes
SetEnvIfNoCase Referer Iskalko.ru spam=yes
SetEnvIfNoCase Referer 4webmasters.org spam=yes
SetEnvIfNoCase Referer best-seo-offer.com spam=yes
SetEnvIfNoCase Referer buttons-for-your-website.com spam=yes
SetEnvIfNoCase Referer free-social-buttons.com spam=yes
SetEnvIfNoCase Referer fiverr.com spam=yes
SetEnvIfNoCase Referer free-share-buttons.com spam=yes
SetEnvIfNoCase Referer sharebutton.to spam=yes