Typical n00b request! No one will delete your forum account, period. Your only way is: 1) to delete all your posts; 2) change the password in one with random letters; 3) logout and don't came back anymore.

Also a simple search would list you similar topic wich could have answered your n00b question:

===>>> https://bitcointalk.org/index.php?topic=912801.0
===>>> https://bitcointalk.org/index.php?topic=850621.0