That depends on who answers the question and how well they support their answer.
Yes.
WikiAnswers is valid when the people who answer the questions are providing valid answers. When people abuse the web site and put junk answers on the site, then it is suspect. Consider the person who answered and whether they have earned points from other users. Answers by a named user are more likely to be good ones then those answered by IP addresses. And it is always a good idea to verify your information from more than one source.
Wikianswers is not a good source because anyone like myself could have made these answers up.
WikiAnswers
Maybe becasue it is not a valid address.
Yes. WikiAnswers is now a part of Answers.com. All accounts that were created before the merging of Answers.com and WikiAnswers are still valid.
No, WikiAnswers is not a Primary Source. However, the Related Links section of each question may be used to find other sources, even a Primary Source.
Of course it isn't, WikiAnswers is a source of information so a WikiAnswers obsession just furthers your knowlage.
It is valid but it is reserved as a source address only by RFC1700 standard.
I don't hate it but people hate WikiAnswers because its not great to use as a source on a bibliography for an assignment.
Yes, WikiAnswers is funded by advertisements.
While WikiAnswers is a good source of information, it does not take the place of books. WikiAnswers gives answers to specific questions but it does not give you a story or cover such broad subjects that books can.