I feel mixed about this. I don't think it is a bad thing for films to be prefaced with warnings as certification alone is not always enough f a guide ... I don't like violence , but don't mind seeing sexually explicit scenes .
I think re 'The News' that is different altogether and there has been a 'slide' into showing more and more footage of accidents / disasters where someone has been killed or badly injured. I often think how terrible it must be for the families of these people to see things played over - sometimes years later. Think of how often we have seen pictures of the smoking remains of the Grenfell Tower.
Earlier this year I complained online because , without ANY warning, footage of a truck slamming into the back of a lorry was shown on the local news. This was in reference to the just concluded court case about the accident and the voice over said someone had been very seriously injured. Having lost a family member in a car crash, I found this deeply upsetting and was also concerned that anyone involved and my own family members who had survived the crash in which my DD died might actually have PTSD triggered by seeing it. In later programming, and where the video was shown online, a warning was added.
I do not see the need and I do not think it is approrpiate to provide sensationalist footage that just feeds voyeurism.