It's too clubby, it's taken the general disgust that people feel toward the banality of messageboards that deteriorate into meme-ification or juvenile flamewars... and turned that into a kind of snobby elitism that is just as off-putting.
Don't say "thank you" for a useful post because it takes up too much time and space? How utterly ridiculous. Only an antisocial or asocial nerd would come up with such a rule and think it was a great idea, and I say that as an antisocial nerd myself.
The system of ranking people by points, insisting that every single post be some giant revelation of wisdom that advances the fortunes of the tech industry and mankind immeasurably, etc. has only exacerbated people's tendency to self-aggrandize, kiss ass, over-analyze minutiae, and constantly try to one-up each other... all cloaked in a brightly colored cheerful passive-aggressive candy coating, of course.
I still cruise the site from time to time because it does have great links (one of the few things left going for it) but there is no way in hell I would consider myself part of the community or welcome. I certainly wouldn't and don't come here any more to ask questions or try to learn anything by exposing any gaps in my knowledge to general ridicule and sneering.
My two cents.