And even if they did, these are low tech attacks. Trying to stop people from shooting others (or knifing, or bombing) is essentially impossible, from a technological standpoint. It's like 9/11. How much money and work does that _really_ require? Is there anyone that doesn't think they and a group of friends could not have done the same thing?

[Well, with current tech anyways. A hyperintelligent AI with on-demand wormhole mastery could probably pull it off.]