Right, but it was never meant to specialize in user-directed filtering and discovery to the level you are describing.
To your second point, every social context that gets 'cool' eventually gets LCDed into mediocrity (even HN). You have to outrun the noise, as you described in your #gothgothgoth example
To your second point, every social context that gets 'cool' eventually gets LCDed into mediocrity (even HN). You have to outrun the noise, as you described in your #gothgothgoth example