I'm a school bus driver, and last year right before Christmas we had a notice put up banning Christmas decorations on the buses. We eventually learned that this was because a couple of parents had complained about the pro-Christianity bias of Christmas decorations, which was strange because nobody had put anything on their buses other than the standard secular red-and-green shit; like, nobody put up Jesus or manger scenes or anything like that. We then learned that the actual complaints had been about drivers encouraging the children to sing religious Christmas songs.

It turned out that the culprit was me, because I had asked the kids if they could sing "The Little Drummer Boy". None of the (60+) kids on the bus had ever heard it so I guess some of them asked their parents about it. Ironically, I'm a fucking atheist - I just like the tune. Fortunately the ban caused a giant shit storm as all the other parents in the district complained about it and it was rescinded. For bonus points, it eventually led to the firing of the district superintendent (who was a shitbag for lots of other reasons).