That's really scary, considering the effectiveness of spells and witchcraft.
Your statement shows just what a high regard you have towards God’s warnings not to get involved with this kind of stuff. The fact is that in some cases these kids tap into demonic forces because that is the force behind the occult.
Why do you think real witches cast actual spells within certain circles and other drawn figures on the floor? It is for their own protection. Sometimes that protection doesn’t help them. I have seen interviews with real witches who have talked about becoming possessed by demons even with other witches around as well as other protections. Some have even called it quits after such an episode happens to them.