Looking at generations has more to it than simple ageism. Much of human behavior is a product of their culture, their surroundings. These surroundings change over time, and in the modern world, very rapidly. It's the music, the films, books, memes, sayings, attitudes etc.
Discrimination is definitely something we want to avoid. But completely ignoring these unique cultural influences that change year-to-year, and are a natural part of growing up, is simply foolish. Parents do not, and should not, simply bear 100% responsibility for what their kids do, when their kids are not, and should not be, complete and utter slaves.