DS8 has a gum chewing aversion. If anyone even looks like they MIGHT be chewing gum, he becomes obsessed with the person, might even ask them what's in their mouth and want to check in their mouth. He gets so upset that a couple times I've had to email teachers and ask that he be put away from gum chewing kids. I probably come across as a major helicopter parent. Unfortunately, there is nothing in his IEP about it (and the gum-chewers have it as an accommodation in their own IEP) so I have to keep re-visiting the issue with individual teachers.

As for the 504--this is why I don't like 504's. It seems like it's up to the parent to monitor compliance, then everyone gets up in arms about it.