NEW ProCon.org Website! – Are social networking sites good for our society? – The popularity of social networking sites more than quadrupled from 2005 to 2009. Facebook has more than 300 million users worldwide, MySpace has about 130 million, and Twitter has an estimated 54 million. With the growth of social networking sites come concerns about threats to children’s safety, lowered worker productivity, and potential security breaches. ProCon.org’s newest website explores the pros and cons of whether social networking sites are good for our society.