interesting, TT, never knew that.
I'm not surprised. I haven't seen that term since the internet became popular in late 1990s.
so a "dragon" in cyberspace terms is someone who "flames" others a lot then?
Makes sense, doesn't it?
It's more of a troll 1st class. We're talking pure "internet hate" here.
what measurement is used to determine whether someone is a full-fledged "dragon" or just a humble "troll" in cyberspace?
Lessee... someone threatening Neo N-azis, would be a good example. "The Engineer" was a troll, going as far as intimidating, bashing other handles, never beyond the limits of movies and TV shows. People "gay bashing", say, would be a dragon.
Troll or dragon, which one are you? 
--TT