A smile, or a shy smile (aka smiling and then looking down still smiling) usually portrays that you have some form of interest. Just make sure the guy knows who it was directed too. Like not someone behind or to the side. Guys are retarded pretty much.
lol if they dont pursue cars with criminals doesnt that encourage others to flee? The point is someone decided to steal a car, not pull over when told, speed, and drive through red lights. Thus person behind the wheel is at fault.