Ignoring your Godwin to infinity, you have a point. It is the same type of logic why reporting details or glamorizing suicides in the media can lead to future suicides. Some of the things that the media are trained on (usually) include not describing methods in detail (like the types of gun used) and not showing the mourning or lamentation of friends and family. I think both of these would be applicable when reporting on mass murder. In the case of suicide, it allows a person with suicidal ideation to imagine in detail a glamorous death where everybody mourns for their loss. The case of mass murder might be similar (but instead of mourning, they are remembered in infamy).
