You have to remember it's high school, and the majority of players will not go to the next level. Also, as a college player myself, you don't see it as much as you used to, which means if the refs aren't calling it, they're not going to do it anymore. The kids that dive in high school are, no offense, usually foreign. In high school, it doesn't benefit you to dive or to foul hard, b/c unless you go pro, you don't see it much at the college level.