An assistant English and humanities professor at Reed College urged students to stop protesting lectures in an op-ed published in the Washington Post.

Professor Lucía Martínez Valdivia says students have been attending lectures holding obscene signs and even seizing microphones from teachers to hijack one class.

"The signs intimidated faculty into silence, just as intended, and these silenced professors' lectures were quietly replaced by talks from people willing and able to carry on teaching in the face of these demonstrations," she wrote.

Valdivia joins a growing chorus of academics denouncing disruptive student protests on campuses across the country. Last week, Michael H. Schill, president of the University of Oregon, called students' anti-fascist protests "misguided" in the New York Times.