Parents should be grounded for bad behaviour. New research has found that many parents are not enforcing age restrictions on their children watching movies at home. As a result many youngsters have become "desensitised to violence and bad language".The University of South Africa and the youth research unit of the Film and Publication Board researched the behaviour of about 100 children aged between seven and 17 in Gauteng and Limpopo.Other findings included that:Children often watch movies alone;Sexual content, violence and horror in films have the most obvious effect on children; andExtremely violent gaming has gained popularity among children.One child of 10 or 11 said about a horror movie: "I got scared at first with the horror and then I felt sad about what they did to the young child."The children pinpointed scenes that disturbed them."It was a scary movie that we watched. It's called Annabelle. It's about a doll that's possessed. Ja, we got scared in that movie!" said one teenager.Another said: "Pretty awkward. I was watching, I think, Twilight, and they were like having hectic sex and I was kind of looking around."The research found that although children try to sneak into age-restricted movies, cinemas are strict about allowing admission.Parents should "lay down the boundaries" for their children when it comes to media content, the Film and Publication Board said.It recommended that there be a common classification system that could be "implemented across different media industries".Shaheda Omar, of the Teddy Bear Clinic, called for stricter age classification of movie content."There is evidence that if children see violence they are likely to re-enact it," she said...