Police need only the flimsiest of suspicions to stop you on the street, detain you, and search you. But even if they don’t even have that, they aren’t likely to suffer any serious sanction for an illegal search. Nor is a court likely to believe you should you try to complain. If you resist—physically or verbally, whether the search was legal or illegal—they can bring the hammer down, with damn-near impunity. And after the violence, you’ll be the one going to jail.