Well, I don't fly helicopters - only fixed wings so far - but there usually are helos landing and taking off at the local airport (SBUL). I once was taxing with a small piston plane, right behind an A320. Then the tower told both of us to hold position, while an AS-350 maneuvered to land, while also telling its pilot to avoid flying over aircraft and buildings. This time, the spot where the helo landed didn't require it to fly over us.
But there is a Robinson R-44, based at the airport, that flies almost every day. Its parking spot is a maintenance hangar, which is right beside one of the main taxiways, which in turn is parallel to the runway. But everytime it takes off and lands, it flys directly over the taxiway and the runway, crossing both - and well below 300 ft AGL. Actually, the tower once happened to clear it for landing right after clearing another aircraft to land at the runway, even though it landed well ahead of the acft.
Honestly, now I'm confused.
I like Hueys, btw.