FSFのcopyright assignmentではFSFに本名を知らせる必要はあるけれどハンドル名のみを公開してもらうようにできるのかな?
> If a contributor wants the FSF to publish only a pseudonym, that is ok. The contributor should say this, and state the desired pseudonym, when answering the request- form. The actual legal papers will use the real name, but the FSF will publish only the pseudonym. When using one of the other forms, fill in the real name but ask the contributor to discuss the use of a pseudonym with assign@gnu.org before sending back the signed form.https://www.gnu.org/prep/maintain/html_node/Copyright-Papers.html