Yes one of my friend has been hold to the immigration because of the changing moods of the immigration officer actually Ive experience it also last 2007 they are asking me whats the purpose of my stay and what kind of business im doing here in doha because its my first time im little bit nervous and the immigration officer refuse to stamp my passport that's why i change lanes and the other good officer there let me pass i think its depends upon there moods but nowadays its more stricter they asking for valid ID that your working there in the Philippines and the real purpose of your stay here in qatar is business and not for job purposes.