The Constitution suggests that when
censorship is appropriate, only the methods which are least
restrictive of citizen's ability to learn and express him or
herself are valid. Therefore, one cannot restrict material
inappropriate for children in such a way that adults cannot
access it. Recently, the Supreme Court ruled it unconstitutional
to make laws requiring cable channels to restrict adult
programming to "safe harbor" hours on the grounds that "signal
bleed" made these sexually explicit programs partly audible or
visual and thus accessible to children. The existence of
technology allowing cable operators to eliminate the signal bleed
was the least restrictive means.  See the Georgia State method of
preventing a student from putting racist material on his website