I can't guarantee that every tweet coming out of the Barack Obama Twitter account was written by him personally; in fact I would tend to doubt it and quite honestly I would HOPE not -- he's got better things to do. However, there is no rule that says he can't. After all, he
is the president; those who might want to pass rules stopping him from doing so have to take his orders.
Alizée has a somewhat less demanding job than the President of the United States. (A little bit. Just slightly.
) She could and I believe should communicate a little more often, and I would say more often in a two-way manner. It's the new way.