There are thousands of people who's job is to actively research and find ways to create effective propaganda. It doesn't matter how smart or stupid humanity is

There are thousands of people who's job is to actively research and find ways to create effective propaganda. It doesn't matter how smart or stupid humanity is. There will always be flaws to abuse to create propaganda. So, if we agree with "Propaganda generation is a given" - what should we do with the people who are creating it and what should we do to protect people as much as we can from corporate backed propaganda?