Have we forgotten Megaupload? Napster? Limewire? BitTorrent?
Anyone setting up infrastructure has to consider, in the very least, how this will be used for CSAM in particular but sure, I guess terrorism too. Years ago we had The Office make a joke about this where the company website for selling paper was overtaken by child predators.
This is one reason why we have centralized infrastructure and not federated infrastructure. All the platforms we have have the capability to report content, automatically scan pictures, images and text and to respond to law enforcement. You need all of those processes.