I have a suggestion.

You could write a function to measure the descriptiveness of the title, and if it falls below some threshold prevent the message getting posted. Then the user will be forced to post a more descriptive title.

Obviously "descriptiveness" is a fairly subjective measure, but it should be possible to automate it to find the worst offenders. e.g.:

if (word_count($title) <= 3) {
  print "You cannot post this until you put in a more descriptive titl
+e."
  ...
}
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The implemetation of a more sophisticated function "measure_descriptiveness()" could be left as an exercise for perl monks...