It will be important for something similar at the younger grades - tough thing being, under the thumb of parents and school boards, I can easily see such an attempt being squashed. But even an attempt would be terrific.
The students are going to be key in changing this, because the bullying will stop when the bullies start to feel like THEY are the social losers for their behavior. But in the secondary schools, students will not be able to make the change without the support of the adults who are also involved (or at least, it requires that the adults not make obstacles of themselves.)
What a great idea - messages on the ground because depressed people look down. That's brilliant!
Never linger too long with the ignorant,
throw stones at their talk.
Walk only with the lovers,
the mirror of the soul gets rusty when
dipped in muddy water.