Finally, what about the nightmare scenario: Is CRISPR so easy to use that we need to worry about biohackers—either accidentally or intentionally—creating dangerous pathogens? Carroll and others think that the danger of putting CRISPR in the hands of the average person is relatively low. “People have imagined scenarios where scientists could use CRISPR to generate a virulent pathogen, ” he says. “How big is the risk?…
Given enough time, you just need one misanthropic individual.
Edit: and it doesn't just need to be CRISPR. It could be AI, fusion, you name it. The power of the individual to impose their will on larger and larger numbers of people and parts of the planet keeps increasing with technology.