If people are aware that the media is manipulating them and they’ve been shown concrete examples then it stands to reason that they will get better at this the more they do.
That isn't how it works when they were stupid enough to fall for it the first time.
That isn't saying not to try, just pointing out that it is not something that you finished and deserves a pat yourself on the back for a job well done. It is step one in a lifelong effort if you don't want them to backslide right back into the same shit.