Since the devs disabled dropping items and other people picking it up (at least from what I see in PVE) please re-enable it for now until the trading has been implemented.
I think a trade system like Steam’s will be good, I’m talking about the trade window with confirmations and not the part where you need to take out your phones. In PVE we actually do enjoy helping other people at least in my server.
So please, a good trade system will be great. But also, please re-enable picking up items that don’t belong to you for the mean time.