We have turned off the user's ability to delete posts because some very informative topics have been deleted in the past.
I am working on a way around this, where you can delete your own posts but not if they are the start of a new Thread. This would eliminate the problems we had before and would stop the problem with people having to edit their posts to try and delete them.
So in essence what I am trying to do is give you back a little more control over your own posts.
I had to post this in public so I could delete posts from a non-admin account.