What if these hackers had gained access to some accounts of world leaders and coordinated tweets about an impending economic collapse, a run on the banks, a global food shortage, or even worse, a nuclear war...
Yes, this scenario is really scary, also reminds us not to believe everything we read online and double check. But I am sure in such a scenario, there would be an instant response on every channel, that the tweets were fake and maybe they would even shutdown the whole twitter site in such a case.
Yep, I can't imagine what would have happened... markets would have reacted for sure.