Yes, social media definitely plays a huge role here. At the same time, the average person has next to no power at all. They have virtually no influence on mass opinion, little chances of having any influence on it, and even if they could, mass opinion typically doesn't have much influence on public policy unless its of the 'Manufactured Consent' variety. Perhaps we should be talking less about Russian Twitter bots 'hacking' our democracy and more about the fact that our democracy was barely working long before the 2016 election.