Union puts rules in their contract saying 0 retaliation when grievances are filed or disputes arise, explicitly calling out commonly seen retaliations while sti

Union puts rules in their contract saying 0 retaliation when grievances are filed or disputes arise, explicitly calling out commonly seen retaliations while still leaving room to account for other sneakiness or else X and if students who have complaints feel retaliated against they can now appeal to the union who (if convinced) proceed to X where X can mean anything from disciplinary action against the supervisor, lawsuits, or strike. Supervisors who want to avoid X will then be forced to reconsider retaliating against students or at the very least find ways to do it where students don't feel like they're being retaliated against which I suppose is the best you can expect since assholes exist and some percentage of them will end up as supervisors.