I found that some websites respect me. I had my browser setting "send do-not-track", and today when I get on AQR, I saw "...accepted" on the bottom left corner. I didn't know what it meant at first, but then realized that it was my settings. This is the first and the only website I found that has a tip, telling me that I am not tracked. (Though I don't know whether I am tracked, it's still a positive response.)