Sorry if I'm reviving an old thread but I've run into this same problem recently
All of a sudden I have this extra "others" account in the login screen
I believe this happened after I installed the "server" app, but does not go away after I tried removing the app
I've tried to disable root user route, but mine is set to disabled already. I also tried to enable and then disable it again, but the others account is still there.
I can't seem to find the "Allow network users to login" item under Users & Groups so have not been able to try to disable that yet.
Can someone point me in the right direction? thanks
Running Mavericks by the way