Thierry, the websites give away the obvious spamsters (cutting the www to prevent automatic linking):
GuinealPigg, ww.gnethosting.net (domain registration site)
Stomper, ww.stompernet.com (search engine)
Killa55, ww.toasterovenreview.org
tstacynicholsoni, ww.sexogratis.com.mx (porn site, obviously)
Zap 'em.