I think that users should be allowed to edit their own posts like if they forget to say something or misspelled a word. I've seen this on another servers forums and it works well. You can edit your posts on threads or the title of the thread if it's your thread, your messages on your profile and on others profiles. You can edit conversation titles and your posts on conversations. You can also delete anything that you post, if it's the first message on the thread, it deletes the whole thread and same with a conversation. It's annoying to me to not be able to edit posts