University campuses once had anonymous "black letters" posted everywhere, but pasting them up required some physical effort. By posting on a BBS, you make your message available to networked computers across Taiwan--or for that matter around the world--with a few key strokes.
大學校園也曾黑函、匿名信滿天飛，但不同的是，黑函得勞動人力寄送，BBS 的滲透力強，只要進入網路，瞬間就可以傳送到海內外，幾乎沒有時空差距。