This kind of engagement is direct, immediate and, frankly, forces you to think before you write - so the upside is that you can be articulate but the downside is that someone who wants to be vague, may also be vague. But on the third hand? People in an online engagement like this won't let that vagueness stand! So it takes a bit of courage but ultimately, I believe that you get a much meatier exchange than is currently possible with most traditional journalism outlets and how they handle "interaction" with their readers/consumers/public.