How many people have shot up electrical substations, a fairly trivial way to causing widespread harm that was popularized in the news just a few years ago.

But it's only happened a couple times. Because most people just can't be assed to harm a hundred thousand others.

> What stops people is actually access to knowledge.

Very untrue.

I'm a combat vet. I spent years fighting an insurgency and therefore pretty good at that very task. I have the knowledge, so what stops me?

A bold assertion. How many deaths can you attribute to this xkcd comic?