I'm not aware of those, but there may be some indeed -- I'd say the culture is close between US & UK so it can permeate, but how I see it, the problem is rather that University deans do not play their roles (they should protect teachers except in the case of a mistake from the teacher's part) and explain to students they have to be open to debate opinions, but in practice they are so scared of lawsuits or losing students who pay so much that they'd rather fire the teacher than make students become better citizens