User blog comment:Arbington/DLC Theories/@comment-1691295-20100912022205/@comment-1691295-20100912041439

To add variety.

It's a perfectly good, and innocuous, way to add a sense of scale to the game, the idea that Shepard had people he knows aren't the only people in the galaxy.

Don't get caught up in the silly conspiracy theories fans tend to get caught up in. The Shadow Broker is Liara's dad etc.

Cerberus Daily News is another example of this. Occasionally stuff may be hinted at, but for the most part it's just there to do the same thing: add some variety and depth to the game universe.