Here is Treyarchs banning policy for Black Ops 2
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...
