Or maybe just fast enough and being read by a large group of people. It helps the two people who would carry on a long argument to find each other more easily than in a ballroom full of conversations. And it is also advanced by being able to right this minute, rather than having to physically write something out/print it and then mail it. Though I have read some intemperate writings from the golden age of fan 'zines they don't seem to turn into the all encompassing free for alls of an online flame war.