“We want Anders to be forgotten. Labels like ‘monster’ or ‘maniac’ won’t do either,” read another tweet. “Media should call him pathetic; a nothing. #Forgethim.”

Shortly after, a tweet said the account would be shut down. As of yesterday, the account — which was created just days before the attacks — still exists, but all sent tweets appear to have been deleted. The only tweet that was visible previously, and presumably sent by Breivik, was a quote from philosopher John Stuart Mill: “One person with a belief is equal to the force of 100 000 who have only interests.” (Breivik also had a Facebook account, but that disappeared shortly after the attacks in which Breivik killed more than 90 people.)

Anonymous, a group that sometimes undertakes protests and acts of vengeance through hacktivism, announced a campaign last week against Breivik. A Pastebin document titled “Operation UnManifest” instructed people to find and re-write Breivik’s manifesto.

“Let Anders become a joke, such that nobody will take him seriously anymore,” it reads.