That is some hardcore hackery-dackery. It takes dedication and a real desire to learn to put up with such adverse conditions. I know a chap who, for a while, had spotty access to a PC except for the locked down one he had at work in his (non-programming) job. He passed the long hours making tiny JavaScript hacks in the URL bar.
While I don't mean to slight the front-end dev's dedication, there are more than a few of us who learned BASIC programming in the late 1970's and early 1980's... without access to any computing device at all. We would study BASIC from manuals and other books, and pour over program listings in magazines. Then we would write out programs on paper, and "interpret" them in our heads to see if they worked correctly. Some…
Nowhere near as good as the real thing, but I remember loving it nonetheless.