Forums have rules and guidelines about the types of conversations that you may have. If a thread draws out beyond usefulness, it is usually closed if people persist in posting idle chatter with no meaningful contributions. If several individuals make posts that have nothing to do with anything, much less the original subject of the thread, the posts may end up being removed. We do try to be lenient and let people post as much as they want, but there is a limit, as can be seen by the "Update is coming" thread, for example.