Earlier quoted context omitted.
Do you think you are doing your part to discourage future murderers from publishing manifestos? It's hard for me to follow the logic of how what you describe works.
While just not reading it likely has no effect, making this public post about it might dissuade others from reading and discourage manifesto publishing.
FWIW, I'm actually made more curious when people discourage me from reading something, so they may want to rethink the actual impact of that strategy.