Tracking by online marketers can be annoying and even feel like an invasion of your privacy. But before you decide to go incognito, there are a few good reasons you may want to be tracked online. The problem with online tracking is there is no line, and no one has picked up the pen to draw it. There have been discussions between members of Congress, the Federal Trade Commission and the World Wide Web Consortium — the international organization that sets the standards for the Web — but those talks appear to be in trouble. While there are pros and cons to being tracked by third parties on the Internet, the one thing we still lack is a real choice in the matter.