The Founding Fathers considered the judicial branch to be the least dangerous branch. Were they correct?

Some people
would argue that the Founders were wrong about this because of the fact that the courts can have
a great deal of impact on the laws.  They would point to things like the decisions in
Brown v. Board of Education or Roe v. Wade to show
that the courts can be very powerful.  

Although these decisions were
important, the judiciary truly is the least dangerous branch.  It cannot proactively legislate
in any area of law that it...