Many people beleive that social network have had a huge negative impact on human beings and society.Do U agree?

Social networking site like facebook are thought by some to have had a mantly and physically effect on people as well as society.
However in my point of view while I beleive that such a sites are mainly beneficial to the individual I agree that have negative impact on local communities
With regards to individuals the impact that online social media has on each individual person has a clear advantage
Firstly people from different countries are contected each other through facebook.Before this development of technology people rarely had the chance to communicate with anyone outside country.