Helicopter rides aren't terribly efficient, but they sure do create a spectacle.

That's mostly a meme anyway, I think.

I'm trying to find exact numbers. The Chilean government says 120 people executed via death flights. Other estimates say 40+ flights, and 400-500 total "bodies" thrown...but that includes dead bodies, as it was also used as a way to dispose of those who, uhm, perished in other ways.

I'm not talking morals here, but from an efficiency standpoint it doesn't sound like it was terribly inefficient, actually.