Why can't the border checkpoint take pictures?

First of all, no matter which country's law enforcement departments have their own law enforcement methods, these are work secrets. If they are completely leaked, it will be very difficult to fight crime.

Secondly, it is easy to take photos of other passengers, causing information leakage of other passengers and causing harm.

Third, since the customs is the first window to enter various countries, it is of course necessary to do better. If someone takes a picture, it can't be confirmed to be positive, which will damage the national image. (Always hostile)

The entry-exit border inspection site involves confidentiality, and photos and mobile phones are not allowed, especially when customs clearance. Obviously, the state does not want such things to be too public. Although it can't be completely eliminated, it can at least be contained.