Without getting to clever or smart,the Boeing rudder will also blow around ( left to right ) in the wind unless the pilots switch on the"B" hyd elec pumps whilst parked( engine swithched off). WOW both(Airbus and Boeing) will"flap" around in the wind unless some hyd press is applied to the control surface. And no neither Airbus or Boeing has got control locks like some of the larger Turbo Props got( ATR,Dash 8 etc). This is a very simplified version of course.