When I was in college I used to write “Death if taken” on my books. This course will be just as effective. Curses and astrology only work if you believe in them. You are the one who makes them work by agreeing with them.
Depends upon the authority of the one who curses. A curse by God doesn’t depend upon the belief of the one cursed.
A curse by another may be overcome by faith in Christ and what He provided on the Cross.