The Times has run a number of interesting articles about libel recently, and yesterday's seems to incorporate most of the main points which have been raised earlier.
The article refers, of course, to the situation under English law. However, given the phenomenon of libel tourism, English law is now relevant to all sorts of people. And the principle of free speech, plus the need for the press to expose villainy, remains the same wherever you are.
Click here to go to the article, but the Times may ask you to register first.