I've thought about that, but I have figured out it'll just be a mess up stuff, handling temporary files (ppl might decide not to upload etc.) ... it's of course possible to do, but I don't feel the need of it weights up the extra code/work/mess (someone could always mod it ) ... but the extra work needed is IMHO waay more than the use (now an upload either get's rejected, or linked directly to the post, nothing more... (except the orphans that one can select to create if whole threads are deleted, but it's optional ))
either way ... I have taken it under consideration, but rejected it
(and it's not that hard to edit posts ... IMHO, Edit: I do it often to correct spellings etc anyway )