If this question had a reliable (and public) answer then the world would be a very different place!

That said, this is an important question. We, particularly those us who work on critical infrastructure or software, should be asking ourselves this regularly to help prevent this type of thing.

Note that it's also easy (and similarly catastrophic) to swing too far the other way and approach all unknowns with automatic paranoia. We live in a world where we have to trust strangers every day, and if we lose that option completely then our civilization grinds to a halt.

But-- vigilance is warranted. I applaud these engineers who followed their instincts and dug into this. They all did us a huge service!

EDIT: wording, spelling

> How many of people like this one exist?

I guess every 3 letter agency has at least one. You can do the math. They havent't learned anything after Solar Winds.