So if given a preference, I'd take the above board, legal, interference where I am presented information, know its origins, and have the ability to potentially hash out the speakers motives, rather than the Russian alternative.
That's pretty much the legal framework. There's supposed to be some level of transparency so people can figure out motivations. If Merkel says she prefers HRC, then we know who said it and probably why. The Russian social media stuff is fascinating because it was pretty well hidden, in terms of sources and the corresponding motivations.