Both POTUS and Q have used DOA, exactly once. Everyone knows it typically means Dead on Arrival. While that kind of works with POTUS' tweet, it doesn't work well Q's post at all. What works well in both instances is Department of the Army, as in military tribunals. Usually, the Department of the Army is abbreviated as DA, but that would have been too easy. In POTUS' tweet, since the courts aren't gonna handle it, the military will. In Q's post, telling @snowden testify your ass off.