All those random messages would do is convince a lot of those who have doubts about the war that the West is indeed waging an information war and make the official Russian sources seem more trustworthy. Honestly, I don't think you can do much in terms of changing peoples' opinions. Those with at least half a brain understand what's really going on. Those without are never going to be dissuaded from believing in whatever nonsense they believe. Saying this from within the country.