The anti-spam
screensaver from
Lycos UK. It's illegal to operate in many places, because it commits
DDoS attacks. Any reputable ISP would cancel your Internet account for using it, as well.
The Make Love Not Spam screensaver uses your computer's
idle time to commit
Distributed Denial of Service attacks against spammers' servers, so the spammers are retaliating with DDoS attacks against the server that offers
the screensaver download.