I might add, that as a practical matter most of the nuts, or near nutters, and fanactical practitioners of hyperbole, are judgment proof. That little faclet does act even in litigation happy America, as a prophylactic to enriching members of my profession even more.
Here we talk as if we're among friends (or friendly enemies) and I think that is a problem for applying libel/slander laws because our statements are not merely just spoken before a small group but are written " for the whole world to see".
Malice is easily shown- heck it is trumpeted; and people go to great lengths to sound as if they are speaking authoritatively whether they are or not.
I foresee lots of lawyers making bucks before a balance between personal property (reputation) and free speech is found in this new form of communication.