If I write a post I should be able to edit or delete it at any time. Example: I posted, and then my modem choked. When I got it reset and connected my post would not let me edit, so I was not able to make corrections. That's pretty lame from my point of view, especially when posting on the Internet creates a legal document attributable to the author. So even if someone (else) replies - the author should retain full control of the document (post), not the software provider, until such time that disposition (destruction) of the document is legal from a records management perspective.