I don't like writing an article or thread on an external program/page, because I don't have to manage the formatting from top to bottom after copy-pasting it (and I don't have to copy-paste it), so if I may make a suggestion, maybe you can add a simple message that says "Are you sure you want to leave this page? Your thread/reply has not yet been posted," with a "Yes or No" option, when attempting to leave the page while creating a thread or replying to one without having posted the typed content yet.
Either that, or a save/draft feature for threads that you don't want to post yet or haven't finished writing. Granted, the former suggestion seems much easier.
