Overhead while they are dropping is not clever – yes I have dropped close to dickheads flying over the a/f. All the crap about what is legal for A/G is odd – do you think he will lie to you?
A parachutist may exit the aircraft some distance from the airfield if it’s windy, so you need to know wind strength and direction and how it affects the parachute. If you don’t know that, find out. Phone or radio will do. If you can't be bothered to find out stay at home and make it safer for everyone else.
I can understand the concern if you can't raise anyone on the radio (most para aircraft have radio you know!) - then long and low finals will ensure you only meet people under canopy - where you may see them - rather than 120 mph downwards.
Gerry