Given how many idiots there are who make hiring decisions? Yeah, I'll bet that it has harmed a not insignificant number of people. As long as people have noted the movements of the heavens, people have made life and death decisions on the perceived significance of the positions of the stars, sun and moon. Bunk is bunk, and all it takes is one incredibly stupid demagogue to believe a horoscope for the world to change in a horrible way. If there is no other lesson of the last 10 years in american politics, then at least this: never underestimate either the depths of stupidity to which a human can descend, and never underestimate the damage that the truly stupid can cause.