I have a bit of phobia for Drones due to their blades. I always imagined someone running one close to me and using the blades to slit my throat. The first question I asked when I first saw a video of drone back then on G+ was concerning the fierce rotating blades.
I think someone has finally invented a way to cover those blades . It would be great if people are compelled to put on those coverings. I think this is what Regulators should busy themselves with instead of worrying about Cryptocurrency.
The drone image & the covering can be found here :
https://arstechnica.co.uk/information-technology/2017/11/dji-left-private-keys-for-ssl-cloud-storage-in-public-view-and-exposed-customers/