Comment by harikb

Technically the law applies to '100 miles of a port of entry' [1] so they can use it to come into your home too, obviously selective homes. Most population of US lives within '100 miles of a port of entry' [2]

[1] https://www.help.cbp.gov/s/article/Article-1253?language=en_...

[2] https://www.southernborder.org/100_mile_border_enforcement_z...