Do they actually ever use it? I know it theoretically means that CBP can search anyone’s home in NYC without a warrant, but if they never actually do it, they might get shot down in the courts if they ever try.
No, they can’t stop you for no reason.
No, they can’t search you without cause or a warrant.
https://www.aclu.org/other/constitution-100-mile-border-zone
Right, except not being white or having an accent is a reason enough to be stopped.
https://www.cnn.com/2020/02/05/politics/us-citizen-dies-in-c...
And odd example to pick since it seems like he was a suspect in smuggling? That alone is enough to detain anyone.