One thing that just occurred to me is T.K. did not have a freezer to make ice in and keeping the mixing bowl in an ice bath is a damn good idea with nitric esters. Another drawback to that Luddite stuff. Also ice under the receiving bottle for the HNO3. Had he practiced a different faith other options would have been open to him, including not mailing bombs. TheoK he changed nothing except the lives he adversely affected, when he began his anti social crusade there was no operational space shuttle, International Space Station, home computers, cell phones or IPODs.