MediaWiki:Prefs-help-realname

Real name is optional. If you choose to provide it, this will be used for giving you attribution for your work.

Warning: providing your real name is highly discouraged, for privacy and security reasons. Assume that people will know you are on this wiki and that people will be able to see your possible other accounts with the same username. And assume this cannot be undone. See also DID:Privacy.

The exception may be if you are someone who professionally works with trauma/dissociation patients, and want to get credit for your work.