You might want to delete your yahoo account or yahoo messenger user account owing one reason or the other. You might be frustrated with the number of strange friends that you have added to your yahoo account. You might want to remove your complete user details from yahoo database. Deleting yahoo account is very simple and easy to do. Just follow the link given below, sign in with your yahoo user id and password, confirm your action and your account would be deleted/deactivated.
Note: This will delete all yahoo services associated with that account be it yahoo mail or yahoo messenger or any other services.
I hope this trick of yahoo messenger helped you!