Answers Corporation owns this site, not Yahoo! If you create an account here and log in, then you won't see the ads.
Yahoo! wrote Yahoo! Answers.
http://googlesystem.blogspot.com/2006/05/no-more-ads-in-yahoo-messenger.html
If you have an issue with the Yahoo web-site, you should really contact Yahoo and ask them directly. Answers and Yahoo are completely separate web-sites - with no connection to each other.
Block it through mail.
Yahoo answers questions
According to Yahoo Answers,you need to be 13 to become a member of Yahoo Answers.
No,you can't.Yahoo Answers is launched by yahoo,so hence,to create a yahoo answers account,you need to have a yahoo account.
No, wikianswers is not inferior to yahoo answers.
You can ask or answer questions at yahoo answers at any age,but Yahoo Answers says that you need to be 13 to create a yahoo answers account,same for Facebook,Wiki Answers and many other sites.
No, you must sign up with Yahoo to be able to post or answer a question on Yahoo Answers.
You need to create a yahoo ID in order to do it.If you have,then click on Get Started on the right side of the yahoo answers page,fill in your yahoo id and password and hence,you have a yahoo answers id.