Heterotechnology: Improvised Weapons

In recent news, there is a man who assembles guns, explosives, and other weapons from items beyond airport security. Of interest was the fact basic chemistry is used for an explosive charge, by combining water and lithium. While this differs from conventional black powder and propellants, it is still the use an explosive reaction to propel a projectile. As new security measures arise, so to do new ways around them. A better pro-active response may seek to discourage certain types of behavior (such as attention seeking and denial of infamy) than bans on toenail clippers.