Brian here: Hey Roi, great question and a tough one to ask to the experts. In my opinion, it’s a matter of time before someone, somewhere decides to cross that line and cause casualties. If you look at all the critical systems that are still unsecured and vulnerable to attacks, all it would take is one crazy person and a general understanding of how ICS works to inflict damage to the masses. This is why securing ICS should be the #1 thing policy makers and other experts in the field should be focusing on right now. We need more voices like yours out there asking these tough questions to the appropriate people. Regarding who does it well...Again in my opinion, no one is doing it “well”. Well isn’t good enough. It needs to be impenetrable and right now, that’s not the case. This isn’t a mythological unicorn any longer. It’s been done before, and will only get worse.

Vitaly here: Honestly, I don't want to think about it. Last time I thought about possibility of malware crossing the border between virtual and physical worlds to destroy a physical object, Stuxnet happened just the next month. I was thinking only about "why so soon?" back then. I feel same strange feeling every time I hear about sudden disasters such as crashed planes, derailed trains, etc. A security researcher, widely known as halvarflake, said earlier this year (reconstructed from my memory): "Physical objects can be owned and/or possessed by you. Computer systems have additional dimension, which is control: you may own a computer, possess a computer but with current systems design you can never be sure who is in control". This is what wakes me up at night, because this illusion of control we have over computer systems opens infinite possibilities to create tragedies by people who use their power against others. From my point of view, this is what makes human race primitive.