The assumption that memes, misinformation, fake news and cyber bullying are propagating at a higher rate than before and is a new problem could be reviewed. It

The assumption that memes, misinformation, fake news and cyber bullying are propagating at a higher rate than before and is a new problem could be reviewed. It's probably an extension of advertising, behaviour modification and outright propaganda (including agit-prop). Previously newspapers, magazines and televisions were used. Would Facebook etc be giving rise to a new phenomena or is it an existing one in new clothes? Hoaxes are a good subject to look at, like the dead alien hoax. How did a hoax spread before the Internet? Assuming new things are spreading, how can we make a vaccine to protect people against hoaxes and fake news but not against advertising, manipulation, behaviour modification and necessary government propaganda?