Allow activities to be operated in anonymous mode and hide the real names of users.
Specifications available at: http://docs.moodle.org/en/Development:Anonymous_Users
Related issues: MDL-1071
Allow fullname() to be sent an anonymity flag
Additional name fields, to allow Asian languages to flexibly display user names in Chinese characters, local phonetic system or Romanization
This is sort of being included in the scope of this issue: MDL-31776
I say sort of because it will sort of work but may have some holes initially.