Starting from a simple meme and growing into a worldwide group of "hacktivists", Anonymous has perpetrated a number of socially conscious computer attacks. Their activity, both real and supposed has ranged from simple pranks to fighting censorship, taking down pedophile rings, fighting back against perceived corporate abuses, and most recently, fighting against the social media penetration of ISIS.

While much of the hacking of Anonymous is directed at those they have personal beefs with, much of this work has also been greatly beneficial in hampering the operation of people and group that pretty much everyone hates. While their methods are controversial, it's hard to deny that they've done great damage to ISIS, exposed sex offenders, curbed corporate malfeasance, fought for the rights of oppressed people.

Here are some of the top operations carried out by Anonymous and their Guy Fawkes mask wearing recruits.