I think it may be a possibility, although I could give you some other reasons for his behaviour. His father abandoned him when he was very young. His mother struggled to make ends meet; she was often away and not able to supervise his activities. Although she did insist that he had to write. It's been noted that he was abused by a few of his babysitters (one of which smacked him, knocked him to the ground, farted in his face, ew, locked him in a closet and pretty much ignored him for the most part) His lack of discipline and frequent trips to movies that contained some severely messed up stuff (at least for that time period) might have also contributed to his books.
He went through periods of depression, took drugs, and became an alcoholic. It got so bad that he didn't even remember writing the book Cujo. He also expresses his own fears in the book "The Shining", where he plays out the fears of an alcoholic attacking his family. In his book "Misery", he talks about a writer getting into an accident, being taken in by a crazy fan that gets him addicted to painkillers, and she says she'll kill him if he doesn't write a sequel to her favourite book. As the tagline says, "she has a lot of ways to spur him on, first is a needle, another is an axe, and if they don't work, she can get really nasty." In his book "The Tommyknockers", he gives people super powers that sound out of this world!
There have even been studies that show, he has some similarities to serial killers: unstable household, no parental supervision. He was also labelled a troublemaker in high school (but aren't we all?). The way he perceives the world is nothing short of astounding though. I've never read any books other than his that make me scared to turn out the lights. This is all abstract thinking of course. He may just be completely nuts, but I guess you'd have to be to write like that.
How many of you believe in telekinesis? Raise my hand.