"Be happy Not Gay" Slogan on Student Clothing Protected by 7th Circuit

From ReligionClause blog:

 

7th Circuit Upholds Injunction Permitting "Be Happy, Not Gay" Slogan on Student Clothing

In Zamecnik v. Indian Prairie School District #204, (7th Cir., March 1, 2011), the U.S. 7th Circuit Court of Appeals upheld a trial court's entry of a permanent injunction permitting any student at a Naperville, Illinois high school  to display on clothing or personal items the slogan "Be Happy, Not Gay."  It also affirmed the trial court's award of damages of $25. The school had attempted to ban students from wearing the slogan on T-shirts under a rule that barred derogatory comments that relate to race, ethnicity, religion, gender or sexual orientation or disability.  The 7th Circuit had previously ordered the district court to enter a somewhat narrower preliminary injunction. (See prior posting.) The school now argued that it should have been entitled to a hearing to show that it had a reasonable belief it faced a threat of substantial disruption before a permanent injunction was entered. The 7th Circuit disagreed. The court relied in part on the "heckler's veto" doctrine-- that speech cannot be suppressed merely because those who disagree with it engage in threats or violence. Alliance Defense Fund yesterday issued a release discussing the decision.

Is this case consistent with Dariano (the US flag shirt case)? Why or why not?