A tenure system that calls for excellent teaching, very good performance in scholarship, and a good record of community service, and is part of a continuing system of evaluation and assessment can enable us to meet our goals as an institution. Indeed, it has been said that democracy is the worst form of government except all those other forms that have been tried from time to time. Nor does free speech allow us to harass someone, or to assault another person's dignity. Free speech on a college campus is also subject to the limitations of effective rhetoric. One can say things to graduate students that one should not say to younger students.
Professors can push seniors harder than they can push freshmen.
The point of rhetoric is to get one's point across effectively. Civility, decorum, collegiality, and a sense of respect should guide discourse on campuses. That said, there are times when professors should not tip-toe around sensitive issues. There is a time to push, and a time to make intellectual demands.