This is not a JW story, it was Plymouth Brethren (but the mindset is/was not so different).
About 50 years ago I was told by my grandmother of a woman who had died suddenly and quite young. Her arms dropped off because she was knitting on a Sunday.
True? No, of course not, but my grandmother believed it - or at least would not question it (she wasn't the sharpest knife in the drawer). My mother would probably not have believed it - IF she ever allowed herself to think about it rationally. Such is the power of indoctrination by fundamentalism/cults.
In the PB 'Gospel Hall' I attended/was dragged to as a very young child was a painted banner across the wall 'God is Love'. Well, the one preached there wasn't and the over-riding feeling was of a malevolent super-being who watched everything (a la Orwell's '1984' Big Brother) who was ready to strike with plague, afflictions or death without prior notice or without necessarily explaining which particular regulation might have been transgressed.
Back to the point of the thread - toe the line you survive and may get benefits (a space in a parking lot?!), break a rule you may have been unaware of and you get to suffer. JWs and other fundies are not so different in that way.