Treyarch has been kind enough to outline exactly what will force the ban hammer to swing your way in Call of Duty: Black Ops 2, so theres no excuse when it happens.

There are two levels of infringement, the first is a minor misdemeanor and will see you temporally suspended from the servers for between 48 hours and two weeks. The second level is an extreme offense, this is when a player has caused problems for other users or has organized a large group of commit offenses, pick up one of these and you will be permabanned.

The bannable offenses are exactly what you would expect from a Call of Duty title, ranging from modding/hacking the game to boosting/glitching. Every rule seems fair and the punishment fits the crime so I doubt many fans will complain about the list.

Definitions

Temporary bans can range from 48 hours to 2 weeks, depending on the severity of the infraction. Permanent bans are lasting and final.

A minor offense is one in which no quantifiable damage has been done to another user or the game community at large. An extreme offense is one in which a player has caused detriment to other users or has organized large groups of users to commit additional offenses.

Modding/Hacking

Any user who runs a modified version of game code or uses a modified game profile is subject to penalty.

First offense: User will be permanently banned from playing the game online, will have their stats & emblems reset, and will be blocked permanently from appearing in leaderboards.
Console users who modify their hardware or profile data will also be reported to console manufacturers. PC users on Steam will be reported to the Steam enforcement team.
Pirated Content

Any user who illegally acquires Call of Duty: Black Ops II content is subject to penalty.

First offense: User will be permanently banned from playing the game online, will have their stats & emblems reset, and will be blocked permanently from appearing in leaderboards.
Console users in possession of illegally acquired content will also be reported to console manufacturers. PC users on Steam will be reported to the Steam enforcement team.
Unsupported Peripheral Devices & Applications

Any user who utilizes an unsupported external hardware device or application to interact with the game is subject to penalty. Unsupported peripheral devices and applications include but are not limited to modded controllers, IP flooders and lag switches.

Minor offense: User will be temporarily banned from playing the game online, will have their stats & emblems reset and will have their leaderboard entries deleted.
Extreme or repeat offenses: User will be permanently banned from playing the game online, will have their stats & emblems reset, and will be blocked permanently from appearing in leaderboards.
Boosting

Any user who colludes with another user to exploit the game for the purpose of gaining XP, prestige, game score, weapon level, or in-game unlock is subject to penalty.

First offense: User will be temporarily banned from playing the game online, will have their stats & emblems reset, and will have their leaderboard entries deleted.
Second offense: User will be temporarily banned from playing the game online, will have their stats & emblems reset, will have online split-screen privileges revoked, and will have their leaderboard entries deleted.
Extreme or multiple repeat offenses: User will be permanently banned from playing the game online, will have their stats & emblems reset, and will be blocked permanently from appearing in leaderboards.
Glitching

Any user who abuses an exploit in game code or other established rule of play is subject to penalty. An example includes but is not limited to using a hole in the map geo to intentionally go outside of the map boundary.

First offense: User will be temporarily banned from playing the game online, will have their stats & emblems reset, and will have their leaderboard entries deleted.
Second offense: User will be temporarily banned from playing the game online, will have their stats & emblems reset, will have online split-screen privileges revoked, and will have their leaderboard entries deleted.
Extreme or multiple repeat offenses: User will be permanently banned from playing the game online, will have their stats & emblems reset, and will be blocked permanently from appearing in leaderboards.
Offensive Behavior

Any user who is found to use aggressive, offensive, derogatory or racially charged language is subject to penalty.

First offense: User will be temporarily banned from playing the game online.
Second offense: User will be temporarily banned from playing the game online and will have voice chat privileges in the game revoked.
Extreme or repeat offenses: User will be permanently banned from playing the game online, will have their stats & emblems reset, and will be blocked permanently from appearing in leaderboards.
Offensive Emblems

Any user who creates an emblem with sexually gratuitous images, racially offensive material or foul language is subject to penalty.

Minor offense: User will be temporarily banned from using the Emblem Editor, and all emblems will be reset to default.
Extreme or repeat offenses: User will be permanently banned from using the Emblem Editor, and all emblems will be reset to default.
Offensive Live Streams or Unauthorized Live Stream Content

Any user who is found to have offensive or unauthorized content in their live stream is subject to penalty. Offensive content includes but is not limited to foul language, racially charged language, and nudity. Unauthorized content includes but is not limited to unlicensed music, TV shows, movies and brand logos.

Minor offense: User will be temporarily banned from using live streaming and may have camera streaming privileges in the game revoked.
Extreme or repeat offenses: User will be permanently banned from using live streaming.
Extreme offenders will also be reported to the live streaming service provider and may have their account revoked by that service provider.

Please keep this topic alive to help more people