Here’s one you may not “like.” Imagine having a friend on Facebook who matches up your privately shared data to a public voting record -- then flags you for more frequent campaign calls and contacts. That’s exactly what the Democratic party is doing. The upcoming presidential campaigns are eager to get their hands on the treasure trove of voter data that 900 million users have voluntarily posted on Facebook. Enter Social Organizing, a new tool developed by Democratic activist group NGP VAN. Using it, your friends can log in to Facebook and tell the service about you. You can then...