I had this question for a while, good thing I remembered. Tara gave a hint through the calendar. Why in the world would she do that?
That should mean that she both knows that Deanna is after her (and she knows where she is), and is pinned, unable to say anything directly. And there are still more private means of sharing information, if she didn't want to make it public. Not to mention that the hint was sooo subtle, it's a miracle we got it. So, what was the reasoning behind the puzzle?