One of my husband's colleagues came back to Doha to give a guest lecture the week the NOC laws came into effect. Since he didn't have an NOC to present at the airport and couldn't reach anyone at the university because it was Friday night, he was deported back to the US! Bless his heart, at age 75 he turned around and came back the next week. Guess he forgot to call the newspapers to complain also.
Mandi