I suppose I agree, and at least you would get refused entry before you actually fly, rather than getting there and being told to "do one"...

I live in Ireland and travel to the US regularly with work. The US Immigration guys in Shannon and Dublin are still complete dicks, although they are admittedly less of a pain in the ass than the immigration in Newark, but those are the only three US immigration I've been through. To be fair though, if you want a tough stance on the people you want to let into your country, complete dicks are just the kind of people to do that job well.