I don't think you're wrong for noticing that trend, but I don't think it should be a trend we follow. A country that prides itself on freedom and equality (under the law) should probably buck the trend that says "because of where you come from, you must be treated differently."
It's not that it's not a reasonable thing to do, but that it conflicts with our stated ideals.
One thing I like about Americans is that wherever you go in the country, there's usually not the same international trend of a "foreigner's price" for things. Turks, Brits, and Yanks all pay the same for a New York hotdog, ya know?
This has the feeling of "woman so evil, she'd justify deporting her own brother's wife 'on principle'."
Yuck.