Scammers can steal your personal information and with it, act if they were you. Once they have collected all that information they can act as if they were you online, and withdraw money, commit cyber crimes and many other risky moves online. Scammers always take the most care so you do not get any letters at your address, so you may ignore their actions for a long time.
Have you fallen for a hoax, bought a fake product? Share your scam story and warn others.