My recent trip to Macau had one experience. On approaching the entrance to the "Boarding Gate" on the way back, we were confronted by a massive scrum of people, about 15 people across and 20 deep. These were the people waiting to go through to the waiting area. Everyone, without exception, was pushing, snarling and shoving. I can't believe they were ALL mainlanders....? We stood back but were urged by someone in the "stand-by" queue to get into the scrum to secure our seat! It was quite scary for our son, as he was bumped and jostled quite viciously at times.
Edit: that was a genuine question, surely not everyone in the melee was a Mainlander?