Does anyone have such a child, and do you try to teach them "there are times when you can/should break rules"? I expect a few of them are making their presence felt at this time, with comments such as "they're not social distancing", or "I'm not allowed in the supermarket!".
I was a great stickler for rules; I was also very good at memorising and quoting them. I was always telling my parents off for crossing at the red man, saying "bloody", pointing out the "no cycling" signs in the park where my dad used to take me cycling. I did it a lot at primary school as well, became the class snitch, and predictably, made myself unpopular. I probably grew out of it as a teenager, or learned when to keep my mouth shut, but I never enjoyed breaking rules. I remember also being shocked to learn (aged 19) that if a party invitation said 2pm, you were supposed to arrive late; everything I'd learned in childhood about punctuality was suddenly turned upside down. 
I think my parents humoured me when I did this, but I'm not sure if they ever actually explained that in life, sometimes you have to decide when to break rules; and that constantly referring to rules makes one a person nobody wants to be around.
Has anyone had to actively persuade their young rule-sticklers to loosen up a bit, for their own good, and to teach them when rules should be kept (e.g. game rules), and when they're intended more as guidelines?