Directly related to what you are saying, DNC consultants and execs caught on tape explaining how they plant fake Trump supporters at rallies to disrupt them or get negative media coverage. It is pretty interesting from: 1/ a partisan PoV, 2/ a methodological PoV; you are right there is a war for information that is being waged.
[1] - https://www.youtube.com/watch?v=5IuJGHuIkzY