The article says they just hang nearby and take photos, which is kinda hard to prevent. Or just speed onto the base, which normally ends pretty badly for them.

I have been on several as a tourist. We turned the wrong way and ended up on base visiting a museum and lighthouse in Pensacola FL. Our cruise ship docked at a base in Key West FL. They told us not to take pictures as they bussed us across. A highway goes through the national laboratory in Los Alamos NM. Again, the guards tell you to drive straight through without taking pictures.

But how would they know? What could you actually see that doesn’t show up on Google maps? And what if you drive a car with cameras like Tesla?

Edit: Not Chinese, and have never taken pictures in these cases. I learned a long time ago that there are amazing pictures of everywhere on Google. The only ones that matter have my family in them.

It's right in the article. They're either taking pictures from outside, or going in and saying they got lost.