The Internet is great. But, just like in a big city full of wonderful things to do, there are people who will take advantage of you. They will turn your innate curiosity, your desire to be helpful, and other good traits against you.
They prey on your fear and cause you to worry.
All this is intended to manipulate you. If they are successful, they get your money, information, and anything else they can.
They are good. Are you able to withstand them?