It is a cancer in many societies and it is everywhere: on TV, in movies, in stadiums, in the sreets and even between the members of the same family (domestic violence).
TV tends to glamorize violence and movies legitimise and glorify it. It is gratuitious and mindless violence that has many negative effects especially on children and leads to the corruption of young people.
It's unacceptable behaviour, that's why people should be desensitised to violence on television and they should also resolve conflicts instead of resorting to violence.