I mean inner position of the list of files. Horizontal, vertical or both. Is it possible? When I use drag'n'drop it often happens to scroll window content in every direction. It's a bit annoying.
I see your concern but in my opinion scrolling is very nice and useful option, as you can chose where to drop files. (may it be end of playlist, before or after an album, song etc)
I agree that it is required to scroll window content in certain situations, e.g. when you want to select more files than visible inside etc. But horizontal scrolling is not always useful and it always can be done with use of scrollbar.
You can't exactly operate a scrollbar while you're already dragging content around.