Security and safety vs spoofing and terror. How long before terrorists deliver an unrequested package via drone? Fedex, UPS, USPS have considerable proof of transit from warehouse to doorstep. An anonymous (but prettily painted) drone comes out of nowhere and leaves a multiple pound item on your front lawn with no verifiable source, no truck or human to track, not the slightest guarantee that this package has come from where you think it came from. Why are there no public rubbish bins in London? Why can you not leave your travel cases and packages unattended in any public transit center? I’m no Luddite, I’m just pointing out my first reaction to seeing an unmanned flying device leave a yellow package on my front porch.