What if I have disabled option "Override username theme" in Realname module settings?
Then I don't need this module at all, do I?

I am asking because the code of Realname module is a big mess, it's buggy (I guess) and generates a lot of useless queries to the database even when "Override username theme" is disabled! Seriously, on a single node page on my site it generates 81 (!) queries.
So I had to remove realname-related code in ulogin.module and ulogin.info and disable this mess.