You are allowed to stop doing business with a vendor for ideological reasons. What is the issue?
Covert subversive action towards your civilization (effectively slowly doing it while preserving plausibility of denial).
micro economic warfare? is that like warfare involving a single person's decisions?
In this case is waged by "the collective" inside Duke's university against a private business by aligning the decision making parts using ideology and, confessed, done not by utilitarian grounds (features/value/convenience) but purely by also ideological grounds. It's a culture battle becoming an economic battle.