My research is not about communities, but communities arise constantly on the Internet. Also for digital customizable products such as music, for example Last.fm. These communities are mostly based on similarities and, in the case of Last.fm, at the same time about discovering new music also based on similarities. Now there are some critics on this, because these similarities are killing these communities.
"If people can get any song they like, why should they listen to their friend's music, or (horrors) listen to the music selected by a group of barflys? By allowing people to have whatever they want, are we destroying that ability to get along?" (source: Bloggingstocks). The same can be said about blogs, do they only attract people that are alike, or do people with different interests also interact on these topics? Or as a professor of us in class puts it, "blogs are a-social!"