4.1 Flame, blather and spew
4.2 Killfiles, the cure for what ails you
4.3 Some Usenet hints
4.4 The Brain-Tumor Boy, the modem tax and the chain letter
4.5 Big Sig
4.6 The First Amendment as local ordinance
4.7 Usenet history
4.8 When things go wrong
4.9 FYI