Locard's Exchange Principle explains that states that there's a transfer of material when there's contact between two objects.
According to Locard's Exchange Principle, someone who commits q particular crime will bring a particular thing to a crime scene and also leave with something as well. An example is that the person can leave DNA, hair, blood, latent prints, etc.
That’s why the organize it by putting warnings on the media before looking at it so people can choose to watch it or not so it really depends on the person and their opinion on it depending what it is