UC Davis Law professor Vikram David Amar discusses two recent incidents at Stanford Law School and the University of Maryland where student protesters disrupted invited speakers, and he explores the legal and constitutional implications of such disruptions. Professor Amar argues that while protesters have a right to express their dissent, they do not have a constitutional right to “shout down” speakers in a way that prevents the speakers from being heard, and that universities can and should adopt content-neutral policies to prevent such disruptions without violating free speech principles.