I'm not sure what you mean by price discrimination, but basing rates on what country you're from is pretty close to racism and agism in nature. Let's call it "nationalism". As noted in the other thread this sort of thing is banned by the Treaty of Rome in the EU.

Having said that, I don't really want this rectified as what will likely happen is that each country will charge it's highest rate and those of us with the inclination to find work arounds will be out of luck.