Wow, what a great story!
in reply to On "fixing" Perl core modules "in place"
It brings back the memory of a Q/A engineer I worked with almost 20 years ago. When I would handoff code to him to test, rather than take a copy of it for himself, he would go into my source directory, and change my Makefile to build it the way he wanted!
Both stories remind me of the quote by Rick Cook:
Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.