Web giants Facebook, Google, Twitter and Skype have banded together to oppose an online social networking privacy bill in California that would require users’ permission to display personal information such as home addresses and phone numbers, the Washington Post reports. The bill, introduced last February by state Senate Majority Leader Ellen M. Corbett (D-San Leandro), started out as legislation aimed at minors to create stronger privacy safeguards for their personal information. Corbett said in an interview that Facebook and other companies argued that the focus on youth would encourage lying about age. She said the Silicon Valley networking giant protested that youth wanted to better control their information…