Referrer spam isn't really about email harvesting. That would show up as regular visits. Referrer spam isn't even about getting people here to go look there. It's ALL about google crawling RFF, finding urls of other sites, and increasing their desirability score. It gets them a higher ranking when people google for anything they show up for, even if it has nothing to do with anything contained on RFF. Their address showing up in the referrer logs here gets them a higher ranking when you google for 'viagara ciali$ prescription drugs" (and anything else not particularly related to their product, that is a keyword on their web site that you might google for like tri-x, pan-f, fungus, leica"