Hackers Group, any hackers and cheaters.

Anonymous is favorite.

Anonymous (used as a mass noun) is an Internet meme that originated in 2003 on the imageboard 4chan, representing the concept of many online and offline community users simultaneously existing as an anarchic, digitized global brain. It is also generally considered to be a blanket term for members of certain Internet subcultures, a way to refer to the actions of people in an environment where their actual identities are not known.

In its early form, the concept has been adopted by a decentralized online community acting anonymously in a coordinated manner, usually toward a loosely self-agreed goal, and primarily focused on entertainment. Beginning with 2008, the Anonymous collective has become increasingly associated with collaborative, international hacktivism, undertaking protests and other actions, often in retaliation against anti-digital piracy campaigns by motion picture and recording industry trade associations. Actions credited to "Anonymous" are undertaken by unidentified individuals who apply the Anonymous label to themselves as attribution.