Swedes have until June 1st to commit a Distributed denial-of-service attack (DDoS). After that – it will be a criminal offense. It isn't technically one now.
Last year, there were attacks on websites owned by the Swedish government and the Swedish police. The attacks were the result of a dispute with The Pirate Bay. The websites were offline for a number of hours and reportedly the URLs were circulated in IRC channels before the attacks.
We aren't knowledgeable on the exact changes in the law, but sounds as though the amendment would criminalize DDoS attacks, whether carried out with a Botnet, or by an activist crowd using their own resources.