How do I get Yahoo answers to delete all of my questions and answers?

you can't. It isn't censorship and it isn't Yahoo, it's community moderation. . All it takes is 2 "trusted" members in rare occasions only one to report a post and the bots remove it. When there is no moderation message boards can quickly deteriorate to boards full of profanity, bad taste, insults, harassment and other less than pleasant behaviour. We all have the choice, participate on Yahoo's terms or not at all. By and large it's a very worthwhile pass time, we can help others and learn at the same time.

http://help.yahoo.com/l/us/yahoo/answers/moderatio...

http://ca.answers.yahoo.com/info/community_guideli...

http://info.yahoo.com/legal/us/yahoo/utos/utos-173...

When you delete your account your whole account is deleted and that includes your email account and everything in your profile.

Whatever is on the Main Board, in voting, in Resolved Q and in Undecided Q remains in the system for ever unless it is reported by at least 2 people.

Whatever has ended up in Google and other websites remains there for ever or indefinitely.

You can close your account via http://help.yahoo.com/kb/index?locale=en_US&page=c...

You can't. All Questions In Voting or Resolved are now the property of YA.