Is Banning of halloween costumes wrong?

The banning of Halloween is wrong, but it defiantly is fair. One kid ruining something for everyone. Its Halloween and it's supposed to a time of fun and costumes, but where is the fun without the costumes. Can the school really ban the costumes? Yes, they have every right to do it if it is distracting or in any way disturbing others from learning. I feel that it was a really harsh way for all the kids to be let down like they were. But the kid that started the whole thing doesn't feel like it was a serious matter. He doesn't believe that Hitler is a very serious matter. Someone should show the kid who and how this has effected everyone. I believe that the school should let him know how it impacted the school also. And i think that the school should let costumes back into their Halloween at school.