When the Associated Press falsely tweeted that bombs at the White House had injured President Obama, Wall Street indexes lost billions in value. NPR, the BBC, 60 Minutes and Reuters have also been hacked, and the best advice for Internet users may be don't believe anything the first time you read it. In Washington, the pressure's increasing for cybersecurity laws. Should AT&T and other providers share information with government agencies? Would that pose a risk to personal privacy, if there's any privacy left?