The main annoyance is, of course, that if you time out, the screed you spent a decade writing disappears. Moz/Firefox will *usually* let you recover it if you go 'back' after logging in -- that's actually my habit, sign on in a separate tab so I can take the one step back and whack 'submit.' You can get into a 'perfect storm' as I did with a previous article, where I filled my disk so Moz couldn't cache it (Why can't *it* use memory? Well, actually, Epiphany goes nuts in exciting and different ways than regular Moz when it can't write the cache map, and viewing the emoticon popup blew the form out of the memory cache, it seems)... Not all of us feel like cookie-ing or are in appropriate situations to (though I am so I oughta suck it up), but seems like the 'appropriate behavior' would be a fixed buffer on the server-side that would accept a submission no matter what, starting the expiry timer ticking when it receives it (along with Javascript magic on the form to warn you if you're approaching the size of it or something), giving you a chance to authenticate your right to commit it without explicitly 'throwing it out' the moment you whack submit.