Unless the article is correct.
Article: The post-storm housing — a refugee camp on the grounds of the Monmouth Park racetrack – is in lockdown, with security guards at every door, including the showers.
It’s ok to post guards at showers for security.
If requiring ID when inside its also ok to post guards outside to restrict incoming traffic.
It would be wrong to prevent people from leaving. That removes the equation they are there by choice.
I work at a facility that has armed guards at entrance. I have to abide by their rules but I am free to come and go as I please . So nothing wrong with my rules.