Does anyone know the legend of if your driving at night and you see someone without their lights on and you flash them? And if you do what happens?

This particular legend only takes place over a few days, because the legend says that this is a common gang initiation practice. According to the legend, the gang members drive with their lights off and wait for someone to flash their lights at them. When that happens, the gang member turns around and follows the car. He is required to kill everyone in it to fufill his initiation requirement.

According to my dad it means policemen are right there but urban legends say it means gang initiation.

The drivers chase you down and kill you. It's called the 'Gang Initiation.'