You know is it actually based as hell for school-age children to protest? When you think about it they're in a weird prime position.
The worst that can happen is the school will be mad at you, and with the perspective of a full-fledged adult, who gives a shit what the school thinks.
When you're an adult you can't easily go to protest sometimes because admittedly you have to go to work or lose a job house and so on and so forth, but high schoolers can just go fuck it we ball.

Honestly I think my biggest fear with living in a van would be needing to service said van. They won't just let you live in it while it's in the shop for a week because somethings wrong with the engine.