As a guest, a poster may enjoy a more comfortable feeling given the litigious and vindictive world we live in these days. In the program, we as kids were trained to criticize and nitpick each other all the time and that still happens even now eventhough we are adults. One may also enjoy the confusion the "enemy" experiences when trying to figure out who said what. Many survivors probably wish to remain anonymous in reality as well as in here given the nature of the conversations that take place from time to time. Maybe once survivors find the boards, make some posts, meet a couple people, they just lose interest in coming back as who they originally called themselves, so they just type as a guest.