You can. You have to create a user name and password though, just like an email account. Then you can sign in!
If you can't log into Wikianswers, you need to check to see if your user name and password is correct, if problems still occur, your account might be suspended.
It is perfectly safe to sign up for WikiAnswers.
You just press sign out.
you cant
it cant talk
No, a Wikianswers account is free of charge.
you cant by the makers of wikianswers
You have to sign up for it.
When you sign up for WikiAnswers, you are asked to choose your own username and password; you can personalize it from there during the sign-up process.(See the Related question on how to become a member of WikiAnswers.)
You don't have to login it is not mandatory.
You can't
No, You cannot log on to Facebook from WikiAnswers. You can sign into WikiAnswers using your Facebook account however.
The only page that you can have on WikiAnswers is your Bio Page, which you automatically get and can edit at your leisure when you sign up for a WikiAnswers account.