Very inappropriate and uncalled for. It is not the school's decision to disclose the truth of Santa, it is the parents' decision (as clearly stated in the article). They may have apologized, and said that they do not agree with what the sheets of paper said, but they had to be looked over, and they were still handed out nevertheless.

"It is like a loss of innocence. Children should have the right to stay innocent for as long as possible."
So true. That's how it felt when I lost belief in Santa. Of course, I'm over it now.