there is a suggestion back there a bit about allowing people to edit their own previous messages.This could be incredibly dodgy. I wouldnt mind tiding up my spelling mistakes....but how about changing the content of an old message? I could be inserting clever facts I learnt from Malcolm Douglas into old messages of my own, to make it look as if I thought of them first. Or change my political position with benefit of hindight to make myselflook wiser. Or even post song lyrics back in time to before the author had written them! Th main criticism of the internet as a source of knowlege is the lack of quality control as compared to academic papers (subject to peer review)or book-publishing. Allowing people to edit their own old messages would make the knowledge contained in them essentially worthless.