I now have permission from your government to enter you at my will. I can come in silently like a thief in the night, do what I wish, and return before daylight breaks. Or, if I so choose, I can stroll in brazenly in broad daylight and walk your streets with a smile on my face. Once I have crossed your borders I can do things that wouldn’t be legal in my home country, and you thank me and smile pleased that I have partaken of your bounty.
My permissions are not limited to just your borders, but I am allowed to go as deep in as I choose, whether slowly or quickly by air, and I can do so not like others, but with special permissions that allow me past your token defenses.
That's right mothertruckers customs and immigrations programs just got sexy, oh yeah...