I&#x27;m not sure how much that applies here. Killers with manifestos have always existed, it has little to do with the internet. They were always in people&#x27;s faces because, well, they killed people and left manifestos.<p>Where the internet does come into its own is allowing these disturbed people to find other like-minded (like-disturbed?) people, and feed off each other&#x27;s misery, perhaps making them more likely to kill.