I ‘get’ the “oh you are flying the wrong flag so you aren’t the boss of me” desperate misinterpretations of semi-related laws. It’s stupid, but it takes time to explain and honestly it takes a fair amount of trust in a system that usually is working against them (because they are deadbeat parents or idiots who don’t want to pay taxes).
The driving thing is so straight forward you could explain it to a 6 year old.