In a few town lately, we have had vehicles following small kids on their way to school or going home.
I always taught my kids, "if a man or vehicle is following you, turn around and run in the opposite direction. Scream at the top of your lungs while you are running." The last thing any abductor wants is attention being drawn to them.
When my sister and I had the Girl Scout troop, we had a session on this subject. We had a police officer come and speak to the girls. Because they were older, the instructions were a bit different. He told them about running in the different direction, crossing to the other side of the street and try to look at the man for just a couple of seconds so you can see the color of his hair, does he wear glasses and the color of the vehicle. Then a couple of weeks later, sure enough, we had a stalker in the neighborhood. She did cross the street behind the vehicle and while doing so was able to remember the first three letters on his plate along with the color. The found him shortly thereafter trying to find another kid.
About five years ago my granddaughter was sitting on the front steps with her girlfriends. A car pulled up and propositioned them. They even pulled out a wad of bills. All of the girls started to scream. The police found the men a block away. I won't even tell you what the cops did to them as they were being handcuffed.