This ain't new.
I remember doing this in elementary school, in the late 80's. Mostly just to frustrate the teachers. We knew we wouldn't get high off it, and that it burned like all heck. But when your teacher is being a jerk to someone else, or running a really boring class, it's just the ticket to change the direction of things in the classroom.
We'd grind up Smarties and snort 'em like coke.