Nice article.

I think the main issue is what you rightly stated: security. There is no security in this system. But maybe there is a solution.

What about a system of reviews associated with some other blockchain company like Civic? Or just do it on their own, where the ID you register is unmutable. If you want to change your ID, you will lose all of your reviews.

You have 1 ID, you need that to be a driver on Cryder. You get reviews, also on the blockchain, and users can decide whether they want to ride or not. Just like airbnb. On airbnb, if you go to someones place and they kill you and bury you in their garden, no one will ever find out, if no one misses you.