...and in a related vein, anyone with a hacker mindset ought to check out R.V. Jones’ ‘Most Secret War’; Jones was the UK senior scientific adviser during WW2 and the book reads like an endless string of anecdotes about one-upping the Germans.

I guess tricking early IFF and radionavigation systems could be considered cyber crime - today, at least, he’d get the DMCA thrown at him for his trouble. :)