Here's a brief mention of the automatic complaint-letter generator in the Arizona Daily Sun (Flagstaff, Arizona) on 17 January 2000:
http://www-csag.cs.uiuc.edu/individual/pakin/complaint
Actually, Scott Pakin's Automatic Complaint-Letter Generator is
more than a Dear Sir or Madam
letter generator. Scott must be
a former philosophy student or something, because he likes to use lots
of 50-cent words in his prefab missives. Keep your dictionary handy.