Scary thing about poison pen letters by snail mail is that it means the creep knows where you actually live. At least, that applies in places where the mail come to our front doors, rather than to some Box Number. Stuff coming through the Internet may be equally distasteful, and indicate the same kind of nastiness at the other end, but it's not quite the same.

You know WYSIWYG, there's the makings of a great comic saga in that example you gave. Perhaps a monologue rather than a song...