For several days now, we are getting referrer spam for websites registered to a
Stumpp, Semmy email@example.com
Maspalomas, Las Palmas 35100
The site names speak for themselves, I think: freelinkpopularity.com, freeaffiliatecoach.com, and a few others. A Google search for the name Semmy Stumpp brings up more of that crap. The spam is coming from IP addresses belonging to Spanish ISP Telefonica and doesn't change too often, so he's probably using his own internet connection to spam.
The user agent for all his requests is Mozilla/4.0 (compatible; MSIE 5.01; Windows 98), but it's some kind of bot and actually blocked by Bad Behavior due to some HTTP violation.