So an encampment at a university, a place traditionally fully of protestors, was left open. Meanwhile, an encampment in a public space was quickly shut down: https://www.youtube.com/watch?v=v45W-KKo3tg . The purpose of a system is what it does, and this clearly shows that university students are only allowed to inconvenience their universities (who have the power to expel them) but nobody else.

If the SPVM, a police force known to be especially stuck up and power tripping here in Canada, doesn't remove them... it's because they have no grounds to do so. Also in Montreal petty crime is a lot less common than in toronto. At least in my experience