Facebook is behind a third of divorces in Iran, the country's internet police was reported as saying on Friday. The social-networking service was also “the most dangerous and disgusting spy tool” deployed by the United States in Islamic countries, Ali Bali was quoted as saying by the news website YJC. Facebook and more than 5 million other websites are considered immoral and blocked by Iranian authorities, but Iranians use proxy software and virtual private networks to get around the censors, and there are more than 17 million Facebook users in the country, according to official figures. Iran has a population of 70 million people, of whom more than 60 percent are under 30.