Suggestion - Don't time-limit Editing and Deleting posts
I think for personal privacy reasons (at least) and for other circumstances we should have the option to edit and delete our posts at any time instead of making them time-limited. I know I regret some of the things I've posted in the past, including links to personal information that I no longer wish to share and am unable to erase or modify references to such information.
I understand the idea of keeping people from changing the initial question when starting a thread but that should just be something people should know not to do on a regular basis unless they want an unpleasant experience in dealing with replying members of the forum.
The active members of the internet, if anyone, should understand the sensitivity and value of personal privacy.