Myself, I really regarded dropship as a nice feature. As Dropbox had implemented the great idea of putting all humanity's data in one big hash-addressable vat, sharing is a logical extension. If you would cache the popular blocks locally (dropbox already does this in a way with LAN P2P), global data distribution would be pretty much a solved problem.
Obviously, this affects legal and illegal files in the same way. It's really a shame that people are still so obsessed with the illegal applications, that they become blinded to how useful this is for legal ones.