Memory Beta:Username

No offensive usernames
The sole purpose of usernames is for logging in and for facilitating communication between members. Offensive or inflammatory usernames are not permitted on Memory Beta, and will be changed by Chops or Lieutenant Ayala. This policy is admittedly arbitrary, but is a right reserved by the project founders to ensure harmonious collaboration between members.

No usernames similar to others
Additionally, to avoid confusion do not use a username similar to those of already existing users. If your username is considered too similar to an existing one, you may be asked to create a different one.

Users who register names that are designed to impersonate other members may be banned immediately, and the IP block may be left in place (see Bans and Blocks).

Custom signatures
The wiki software allows you to use a signature different from your username. It is currently being discussed if, and to what extent, this feature should be used (see Talk:Memory Beta:Username).