I have just one more question please ?
If i want to hide the user/nickname on front page and all pages, this code work perfect. i can not see anymore the user/nickname.
now i get another little problem,
if someone ask a question, is also hide. So it's possible to show the user/nickname only when the people ask a question because a add a option in administration to moderate a question, than we i need to approve, i don't know who ask a question.