No, they aren't.
No.
No, Answers does not post the questions on Facebook.
Yes
Of course. There are many visitors to this site and many of them answer questions. im a visitor! well i signed in from facebook!
Well I will be smoking a cigarette and answering questions here. might even check my facebook.
Simple; you have to use your email instead Facebook login is optional.
Absolutely not.
You can post an answer from answers.com to Facebook by copying and pasting it. There is no Facebook or any other social media share button available to users.
The Future Machine prank of Facebook is a way to trick your friends. You share the link on your Facebook page and tell friends to click it. Once the link is clicked they are taken to the Future Machine where they can begin asking the machine questions. Only instead of the machine randomly answering the questions, they questions go to you, so you can answer them.
No - you do not. Answers is free to use by everyone - the only requirement is that users must register (via facebook) in order to participate fully.
WikiAnswers is designed for asking and answering questions, not for social networking/making friends. You can chat with other contributors on their message boards and see if they have a Facebook account attached to their WikiAnswers Profile. If both of you have a Facebook account, then you can ask to be their Facebook friend.
You do now. When I first joined, there was no requirement to have a facebook account. This has since been changed so that all new users must sign up with their facebook ID.