General Discussion

crossing a flight path of a runway at a very busy airport is not a smart idea. Rule of thumb in safety is you don't "create" obvious situations which can go wrong if you don't have to. Based on the info that this helicopter was a "training" flight they could have scheduled a route away from a busy airport and certainly not have it cross the runway flight path.

Thought of another way you don't take a student driver and run them down the Kennedy Expressway when traffic is full tilt around early evening. You're setting up for an eventual tragedy. It may not be with the first student but it will happen. Needlessly.

I deliver to airports and have to cross runways and your access is tightly controlled with ground escorts and flashing lights. Crossing a runway on the ground is one thing because the crossing vehicle can stop and not proceed into the flight path of an aircraft. When you're in the air there is no "hitting the brakes" in the same fashion as on the ground. I think crossing that approach of that plane was insanity.