Just a word about Columbine.
Columbine High School has commemorated that horrific day every year with a day of service. The school was closed today to facilitate the student's service activities.
The children of Columbine were respected by the US Congress. The Assault Weapon's Ban was legislated. The students today are not receiving that level of concern or respect. Marching is a way to let legislators, parents, teachers, local and state officials know there is something STILL wrong after the deaths of so many students.
I think a service day for Columbine is fine if that is what satisfies their resolve. Unfortunately, for many students across the USA, marching to bring the message, "Not One More," feels right to them.