Social justice protests have been roiling American universities, even causing administrative heads to roll. To a significant degree, these campus uprisings have been characterized by an impulse to restrict speech and expression for the sake of creating "safe spaces" for marginalized groups. However, speech restriction is a double-edged sword that can just as easily injure the very people campus activists seek to help.

The turmoil at the University of Missouri (Mizzou) in particular was sparked by racial incidents. And the protesters are closely aligned with the Black Lives Matter movement, which combats police brutality against black Americans.

However, cops themselves have recently sought to restrict speech and expression in order to insulate that very brutality from criticism.