This is more caricature than reality.
Think about it: if we meet up in a heated thread discussing this or that controversy, yeah, bitching at each other is going to be one predominant form of interaction. Naturally, I won't be asking you about your interests, asking you how everything has been, cracking jokes about this or that random thing, or commenting on how beautiful the past few days have been.
"You're a fucking idiot, dude. How can you not see that you've internalized some rather shitty attitudes?
Oh, by the way, I'm still buzzing about how great that Thai-style sizzling red snapper was. Let's go out again soon!"
Not how it works. :P