“Net users are getting the chance to fight back against spam websites. Internet portal Lycos has made a screensaver that endlessly requests data from sites that sell the goods and services mentioned in spam e-mail. Lycos hopes it will make the monthly bandwidth bills of spammers soar by keeping their servers running flat out. The net firm estimates that if enough people sign up and download the tool, spammers could end up paying to send out terabytes of data.

…The list of sites that the screensaver will target is taken from real-time blacklists generated by organisations such as Spamcop. To limit the chance of mistakes being made, Lycos is using people to ensure that the sites are selling spam goods.

As these sites rarely use advertising to offset hosting costs, the burden of high-bandwidth bills could make spam too expensive…” (BBC) In other words, a DDoS attack on spammer sites…