Honestly man this sounds lovely, but it's just as impossible as the "close twitter" idea. Who's going to teach them? How are they going to teach them? Is some nice old lady going to go around knocking on doors in Ballybough saying "would you like me to teach you how to distinguish between fantasy and reality"?
Man you are a pessimist sometimes . Media literacy training already exists, and there are existing workshops on how internet agitators work too. People learn all the time. It took less than a generation to convince people in In northern Ireland that is 100% normal, acceptable and human to have a cross religion marriage.