Flying into LaGuardia runway 04, if you fly coupled to the ILS on a good weather day, then the false courses due to departing traffic on 13 or aircraft in the critical area will put you either;
A) into the side of a building in manhattan, or;
B) into JFK airspace
Most of the time in the US you are hand flying un-coupled (with the ILS info there as backup) when visual conditions permit as appropriate.