When I go to check my statistics I always find the bunch of users who sometimes visit my blog more often than I do.
But when I try to check their names, it tells me that there are no such users.
Even google or yandex can't find you.

Who are you, lurkers?! My diary is opened for registered users only.
Are you here to spy over me and kill me after?! My poor innocent body!
What did I do to you?
Did Jim Moriarty send you?! He did, didn't he?