I was searched at the border a few months ago on my way in via car from Vancouver to Washington. It did unfortunately appear to be the case that they had selected a significantly larger number of non-caucasion looking people for searches that followed mine (I'm caucasion), thought I hadn't noticed until my girlfriend pointed it out to me. However, while I was waiting for them to finish searching my car, I spoke with a caucasion fellow who happened to be Canadian with a German passport. Based on what he described, they decided that he must have been trying to work in the states without the right visa. They then proceeded to molest him and his personal privacy for 4+ hours. He tossed me a pamphlet that they gave him indicating that they had the full legal right to do so and he was more or less screwed. I proceeded to start deleting every avenue they'd have to view chat messages, emails, photos, anything, but there really was only so much I could do. Fortunately, it seems like they just wanted to try and intimidate me. The search seemed to be a formality. From what I hear, similar things happen on the way into Canadians to Canadians. It's a strange world we live in, and I wish all the good fortune in the world to those who try and fight it.