I know that throwing things cause damage, but if I were to pick up a metal box or a dumpster and drop it from a few stories up onto someone, will it do any damage?
And if it does, does that count against a pacifist play-through?
I had to test this for myself, and here's the result:
As you can see, he is clearly dead, so do not try to climb to the top of a building, and throw things down on people! And yes, that would count against the pacifist achievement.
Note: I did it for science!