Freedom of movement, eh... For the local residents, that's a perfectly normal phrase. They also need such inspections, and as long as there are no issues, they can move about freely.
The madness wasn't contagious, it was caused by three days without darkness, and after the celestial events returned to normal, there would be no more cases of madness, except in very special instances.
As for Black Light, well, ordinary people aren't fit to be affected by it.
Even though the energy level in this world is high, over ninety percent of the population are still ordinary people.
What's a mere formality for the average person meant that Zheng Yichen could expect the majority of his actions in this world would go unobstructed, as long as he wasn't committing arson or murder... No, even if he did, as long as it wasn't too extreme, he probably wouldn't be interfered with?