Does social networking sites consider as a threat or an opportunity?

According to research firm IDC in these days 60% of Indian population known to these social networking sites like face book, whatsapp, twitter etc. and some people consider these sites as wastage of time, misguiding information's, way to riots, negative impact on their children etc and this thinking leads to stop usage of these sites. But as human psychology “rules are made to be broken” and usage of these sites increases day by day and here creates an opportunity for internet providing companies or even I can say that not only these companies but many more organizations take help from these sites for advertisement, promotion, announcements etc. Due to these type of working this year many more sites comes to know for their operations i.e. shop clues, pay tm, yepme, bms etc. There is genuine saying in economics that over usage of anything creates their utility downwards, same with these sites.