The premise of democracy is that voters make their decisions based on information available.  If the scenario you describe is unsuitable to you, then you need to look hard at the democratic form of government which is inherently influenced by information or misinformation.  This problem extends far beyond the current fad interest in foreign influence.  American media and their biases strongly influence elections.  American interests provide information with only their side of the story.  If we accept democracy as our form of government, then we must accept its downsides and every voter need be careful to filter information carefully.  Given that democracy is inherently sensitive to information and always has been, I don't see the current Russia influence fad as a real problem.  Democracy has this problem, and the drive to extend the vote to everyone including those with limited information exasperates the problem.  When a foreign nation fools with ballets, I will join the cry of foul.