Many people protest for human rights, and freedom of speech. In early 2008 a group calling itself anonymous decided to do both to promote these as well as prevent scams from cults such as Scientology. These protest have be given many themes and have promoted global cooperation, on an anonymous scale.
Party Hard

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On March 15th, in celebration of L. Ron Hubbard's birthday anonymous protesters gathered together in both snow and sun to celebrate with cake (or caek in Anon meme). Protests and parties around the world happened on sidewalks across from Scientology offices, continuing a tradition that would continue for months to come.
Game Over

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Fair game, as defined by Scientology as "always attacking the attacker and never defending". In non-Scientology language that's "destroy all critics in anyway possible". To bring awareness to this issue, Anonymous protesters spent May 10th telling the public of this Scientology crime.
Sea Arrgh

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Now most real religions don't have navies, mostly because most real religions don't require a navy in the first place. So then why does Scientology need a "private navy"? That is why on June 14th, anonymous protestors protested this human rights violation.
Spy vs. Sci

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Now if a "religion" with a private navy doesn't make you ask questions, then Spys and private eyes should. After all it would be a sin in most religions to stalk people without reason, and even then true religions wouldn't use spys to do their dirty work. These "Private Eyes" were the focus of the July protest by anonymous in the continuing battle against exposing the world to nearby crimes against humanity.
For more information visit: http://www.whyweprotest.net/en/.