I would like to propose an option to be able to go back and edit your own posts, mostly the initial section and title of a thread but not limited to and could include additions to ones own post. This would not include editing another's post or deleting a post.
An option to prevent abuse could be a small icon that would say something like "This post has been edited" and would link you to the original post.
Reason behind this.
1.Preventing double posting (not a big deal).
2.Not having you and others look at your grammar, spelling and typing mistakes.(I almost always check my work before I post it but I still mess up).
3.Other more obvious mistakes like saying a game starts tonight but starts tomorrow.
4.Community run contests could be updated like an admin updates tournament posts.
5.More reason others could think of.
Thank you for your time. :-)