In fact more people were present in the safety barrier than before, this was thanks to some more illegal stuff he did. Even Mo Jiaxing was present there.
Before the disaster ensued, he wrote some damning emails about the magic association's sewer cleaning missions and how many tunnels were found by the military and the hunters.
Smart people with connections would not directly believe his emails, but he didn't need them to. There was only one thing that could spread faster than a demon invasion, a rumour, a rumour that the Bo City would be invaded.
In reality he didn't care about the panic it could cause or the additional work the government would have to deal with. Some of the more anxious ones had camped the night near the closed door of the safety barrier just in case and as for the rest.
They were quicker to react once the blood alert was released and as for Mo Jiaxing that was hard to persuade he directly trashed his truck's engine and made the travel outside impossible. Let Mu He find another guy to ask for a lift Hmmm.
It wasn't just Mo Jiaxing, he prank called Zhou Min's grandma and had her running to the safety barrier in advance and many more. All in all being a sociable person he has the contact details of many people, most of whom took the warning he left seriously.
As for the rest, Darwin had long proposed the Natural Selection when he was working on a better method to have monsters evolve.
Zhan Kong did move out to eliminate the Darkwing Would Commander, which he managed to repel from Bo, the other military personnel and Hunters closed various tunnels although the Mingwen tunnel was long gone,
Mo Fan found Ye Xinxia and a disfigured Yu Ang in the process, the disater came to an end when the nearest military outpost send twelve High level mages aloft Heavenly eagles.