So I ignore you because I don't like you. Has the quality of the content on Hubski increased or am I simply not seeing the content that I dislike? Ignoring users instead of topics promotes circlejerking and circlejerking leads to bad content.
The nice thing about Reddit is that no matter how large it gets you can always find a nice, cozy, small(ish) subreddit to talk about whatever topic you like after you unsubscribe from the big subreddits of the same topic, but you're never really free from ideas you don't agree with. r/games is a much better place to discuss video gaming than r/gaming, but even if I dislike hearing about, say, DRM, I will still see threads about it from time to time.