Salaam,
I was very scared of Jinn (we call them ghost here) last time. But since I had gradually learn, I'm confirmed that Allah SWT is the most Powerful and nobody can harm us without His permission.
Magic (sorcery) and superstitious still exist today... Even some Muslims do practicing it in which it leads them into syirk. Some people in some places in my country (Malaysia) are still practicing black magic called as Santau (poisoning) using the Jinn and sending dangerous things like glasses pounded to dust, bamboo hair (sharp), metal dust and rubber from poisonous trees to harm people.
People harmed with that kind of magic poisoning will be facing internal injuries that can't even be traced by modern medical technologies. That also could bring to death when the victims vomiting blood and blood rise out from their skin. I had seen this kind of things happen in my country where "Hasad" or jealousy is in those evil people mind.
Those shamans summoning the Jinn through Mantras in many pretexts. Sometimes it seems like using "Islamic" way just to deceive, but later they are calling the Jin with names of devas, asuras, and etc. We once had Classical Hindu background in SEA although we are not Indian, you still can see Hindu-Buddhist SEAn in Bali and in Cambodia or Thailand. I also have Buddhist friends who summoning ancestral deity (Jin) which is related to animism belief to protect them.
Some ignorant people taking Talisman to protect themselves from being harmed by others' magic. They meet the shamans who work with satans (Jin). This is also my experience when I see my father too have a talisman. We had throw it away after we smashed it with knife.
Have you ever come across the term "Qareen"? Sometimes accident happens in a certain places and the person dies there, after that other people who walks there meet the person who looks exactly like the victims at that place and feeling creepy which turns their hair up. I think Qareen is a kind of Jinn too. Any explanation? Because I guess this phenomena is almost the same around the world when I see brother Abu Mus'ab provided some information about them. Last time I thought that this kind of talisman, magic, Jin and others only happen in our region in SEA.