Will courts deliniate what is and is not appropriate for children?

Judge Blocks Ban Of Cancer Bracelet

I read an article this week and about a recent case where a federal judge blocked a Pennsylvania school district from enforcing its ban on breast cancer-awareness bracelets that read "I (heart) Boobies," saying the ban is likely unconstitutional under U.S. Supreme Court precedents on student speech.

The Easton Area School District banned them, arguing that the phrase was vulgar and inappropriate for middle school students.  Keeping in mind that this is a middle school, is placing limits on children and banning vulgar atire appropriate or should it all be protected and free speach? What do you think?

Education Week; 4/20/2011, Vol. 30 Issue 28, p4-7, 1/7p