For me and my of my customers, having your "entire cloud deleted" is like... the #1 nightmare scenario.
So why does this capability/function even exist for active accounts at CloudFlare? It sounds like the OP fell victim to what is essentially a regular process.
Or to put it another way: No amount of explanation or assurance is ever going to make me feel comfortable with my doctor having a handgun as one of his medical instruments.
It appeared to me as though they deleted my domain registration from their system. That's mostly why I freaked out. I wasn't sure if I'd even be able to transfer my registration easily.
However, on the advice of someone from HN, I found that if I went through the flow of linking an external domain to my cloudflare account the registration details came back.
I certainly don’t know what all the DNs entries on my 15 domains are, so if they disappear it’s not going to be easy to get it all back.
I hope for your sake that right now you are fixing that problem?
Your doctor has a syringe as a medical instrument. They can kill if not used correctly.
This is the doctor seeing a patient that hasn't moved in a few hours and executing them:
https://community.cloudflare.com/t/does-cloudflare-automatic...
Oh wait, he was just sleeping? Ah, well... "oops".
There is exactly one reason you'd delete customer data without their active involvement: They're overdue on their bill and have ignored all warnings and communications. That's it. There are no other reasons.
Feel free to disable things if they're a security risk, but Do. Not. Delete. Customer. Data.
Ever.
Unless the mechanism exists for legal reasons, i.e. they are forced to take some sites down by the government or law suits.