Remember having this along time ago you can set an old topic "age" from days to weeks etc.. it would blank out the text area, and you would be required to tick a check to say you will post.
(above copied from WHT)
This thread is more than XXX days old. It is very likely that it does not need any further discussion and thus bumping it serves no purpose. If you still feel it is necessary to make a new reply, you can do so by ticking the box below. Alternatively, you can search for newer threads that contain the same topic, or start a new thread (preferred).