Here in Maine shooting while moving both forward and backwards is part of the LEO qualification courses.
We train on moving and shooting quite a bit, you never know when you might be clearing a room or advancing on someone and need to fire, or need to move to cover while firing. A little familiarity can go a long way towards putting rounds on target and it's always better to be accurate than not.
If you're going to be dumb you'd better be tough. Stupid hurts.