I think this works - need feedback.
Nice lookin hooker spooked a monger, thought she might be LE. Well do this, pull over and ask for directions. If she's not LE, she'll want to get in your car. If she is LE, she'll try to get you to ask for sex while she's still on the street. After she gives you directions, offer her a lift somewhere, if she gets in, you're 90% sure she's SW. If she doesn't want to get in, thank her for her help and drive away. It's always worked for me. That way I avoid LE, and if I happen to stop a woman who's not an SW, they won't call the cops on me for pandering.
Remember, a decoy will always try to get you to ask for sex without getting in the car. So just don't do it. Last I remember, asking for directions was not illegal.