In Ray Bradbury's chilling but prophetic short story "The Veldt" (1950), two children who are given a highly immersive virtual reality play setting, use it to enact, over and over, gruesome scenes of violence. When their parents become disturbed enough by this to take away access to the VR, the children turn homicidal, and find a way to use the VR setting as a tool to murder their parents.
I haven't heard of murders, but I have heard a lot of stories of children and teenagers who become frantic to the point of violence when their access to the internet is taken away. That suggests a very unhealthy psychological dependence.
I wonder if it wouldn't be advisable, from an early age, to require kids to have regular days off when they would have to do something offline: go for a walk, read a book, listen to music, watch TV (if TVs are a thing anymore; I forget).
