here is how games should be called:
illegal screens: only if it is very blantant -- IU has been called for 2 cheap ones taht shouldn't have been called....at the same time, you should be able to fight through screens....
handchecking: should be a foul
good position defense (guy moves feet with ball handler and slight body contact): should not be a foul
over the back: should be called only if defender has a good fundamental block out
loose ball foul: there better almost be blood
flopping: should be a foul on you if you flop