What a hard few days it’s been.

For some—the scores of people who thronged New York City’s Times Square, stopped traffic on a Los Angeles freeway, and more—Twitter’s #NoJustice hashtag says all that needs saying about the shooting death of Trayvon Martin on a rainy night in a gated Florida community more than a year ago. For those who saw in George Zimmerman a man unfairly labeled “racist” and worse for trying, however imperfectly, to keep his community safe, it may seem Zimmerman’s been even more vilified in the wake of his acquittal than he ever was on trial. And for the American justice system itself, well—no one will ever call this its finest hour.

But there’s one group that stands to gain something crucial from all this sadness...