Bad practice as you have the props now driving the engine,which can affect the whole drive train/gearboxes..Increases noise significantly,engine wear on pistons,negative torque on turboprops,and generally shows a lack of airmanship and `mechanical empathy` with your aircraft......Much better to plan a slow-down by easing the power off earlier ,then increasing prop rpm on short final.....do you slam your car gearbox down thru` the gears everytime you brake....?
Your passengers will appreciate a smoother,quieter flight,as will the engines....treat every flight,and your car as if you are taking your favourite grandma for a trip......