But denial-of-service attacks are illegal in a many countries and some organisations have criticised the move. Steve Linford, director of non-profit anti-spam organisation Spamhaus, has dedicated the last eight years of his life to fighting spammers. He said that Lycos has failed to think the idea through.

"It's irresponsible of Lycos to put its name to it because it lends legitimacy to [DDoS] attacks," said Linford. "You can't break into a thief's house just because he breaks into yours. We don't support this or recommend this practice. Directing traffic is part of the degradation of the internet we are trying to stop."