Networking with friends and people is not going to harm productivity per se. The obsession with which social networking activity is done is what causing people to become net-centric and stereo-typed, oblivious to other offline social activity that they could have indulged into. Leisure time is being increasingly occupied by unproductive activity like networking. It is akin to constant SMSing by youth. It is obsessive-impulsive activity that affects their productivity.
