Totally agree, just want to add that their are different kind of schools and different kind of kids. If your kid really gets bullied, you can still change the school or send them to a fitting school in the first place. Not an ordinary high-school. "Just" have to make sure your kids would tell you.

An besides, even though bullying is unhealthy for the bullied kid, is a great experience to learn how that stops if you bash the right people, how to hack and influence society (maybe not something you want your kid to learn though).