Yes we should, it is a nice feature for new members who like to introduce themselves. And in turn they can feel welcome when they get a response and they can feel comfortable to post more.
Well said, Kahane-Was-Right BT.
Each person who comes to the Forum is unique. Some like myself didn't post a intro message when coming to the Forum. I've been posting on Internet Forums/ Message Boards/ Newsgroups since 1996 and wanted to respond to some topics relatively quickly.
Many though might view an Introduction Message thread as a bridge for them to become regular participants in the Forum.