"Right? You're Muggles," said the boy. He smiled twistedly. "You have as much standing in the magical British legal system as mice. No wizard is going to care about any arguments you make about rights, about fairness, they won't even take the time to listen. You don't have any power, see, so they don't have to bother."

Admittedly he was overstating it to make a point, but it's still mostly true.