I work near the leaning building in San Francisco that has tilted 14 inches but trust me you can't see it. Our eyes are not nearly accurate and distortion free enough to notice it.

Another way to look at this problem - get to equal desks and stand vertically but a mile apart - preferably in a very long indoor halfway. Use a laser to go perfectly horizontally from one desk to the other and you'll see it hits the other about six inches above the other. Yup six inches - it is that far off at only one mile!