Who needs a social network? HN is almost too much. How much hubris is enough to say "people should hear my smallest thoughts and acknowledge them with appreciation or by repeating them".
Social networks are a tech/tool. Like most other tech/tools, they're more magnifiers of existing facts of the human condition than they are things that fundamentally change them.
If what you dislike is the thoughts of other people, fortunately there have always been choices that can increase isolation.
The barrier for forums seems to be large enough that the posts that get submitted are often finished works only.. at least in my experience. To me that's less interesting.
With that said, lately i've been in the process for searching for one because of the reasons i stated above. I'm looking for a like-minded community on Art stuffs. A forum will do, but microblogging seems to be more inlined with my desired, as i described above.
I guess to reword my previous post; "social networks" can have different applications in my view. In the case of microblogging, i like the idea more as a Forum flipped on it's head to reduce friction on content posting.