They can&#x27;t; even the not free societies - think prisons - are not safe. People that want to do Bad Things will do them. Even if they didn&#x27;t have guns or weapons, they could&#x27;ve - for example - get enough people into a dinner party or restaurant, have everyone grab a fork, and start stabbing people in the eye.<p>Terrorism doesn&#x27;t need weaponry. The only deterrent would be to read people&#x27;s minds, and you&#x27;ve probably watched Minority Report and other such dystopian scenarios. It&#x27;s something that needs to be solved at the root, and TBF I don&#x27;t believe it can be fixed.