Not much different than any sport on the planet.
I mean how many armchair athletes are there in Basketball, Baseball, hockey, Football or Soccer?
People sit around and endlessly criticize athletes for what they do. Its almost part of the enjoyment of the sport, and part of being a fan. WHen you're a top level athlete you should expect some criticism, and you should be strong enough to address it or ignore it.
I think on here it just blends the line a bit, because we do so much featuring of the good content from the up-and-comer.
What I would claim is that there's a lot of shit-talking that isn't founded. Like if someone is super fucking sick but you think their style is whack - they don't suck. You might not like their style, but they don't suck.
Debate makes the whole thing fun.