Having travelled frequently i havent seen a singlentime that they bother checking luggage, either on way in or out. If you enter they screen your luggage but i have never seen them opening anything. On way out dont bother with putting bag with liquids or laptop out. They just dont care. The pad down is equally meaningless if you trigger the alarm.
As a general comment, the UAE are mainly hypocritical. So dont worry. As long as you spend moneynand are discrete, nobody will ask.