That’s clear, that’s true. But, what is really happening in Social Media? Many times, walls or tweets do not find recognition. Clearly, in this case, we have communication withouth interaction.
Thus, which is the real value of communication through social media? Recognition! A retweet, a like or a favorite are needed for creating social presence and real communication. If not, it is like look at an aquarium. Knowledge sharing as to work in the same way: valuable only through recognition. Social media mechanisms can help.