The historical connections of the people living on both sides of the border has resulted in the border being extremely porous, with a lot of illegal immigration from the Philippines occurring.
Hubungan sejarah masyarakat yang tinggal di kedua sisi perbatasan tersebut menyebabkan perbatasan tersebut sering dilintasi, sehingga mengakibatkan imigrasi ilegal dari Filipina.