The recent federal court rebuke of New York City’s stop-and-frisk tactics shows that many disputes are best resolved through politics, not lawsuits. Courts resolve discrete controversies — whether existing law has been violated. They’re not equipped to answer questions about what the law “should” be. Judicial remedies are supposed to make plaintiffs whole, not rewrite policies wholesale. But try telling that to Judge Shira Scheindlin. She not only enjoined NYPD’s existing tactics, but also ordered the city to video all stops within certain precincts and appointed a monitor to “develop . . . a set of reforms of the NYPD’s...