This would be a good day for my kids to be “sick”
If the kids are young, then keep ‘em home. If they’re old enough to understand what the agenda is, tell ‘em that they can go to school and be as LOUD and boisterous as they feel like being. If any of the teachers take offense, tell the kids to have them call you and you can take great joy in telling them just what they can do with their support for fudgepackers and carpetmunchers. And let them know that if they want to take any action against your children or you, your lawyer will be having a nice delivery of a bunch of typed papers for them real soon. And don’t back down.
Noise would be a LOT better than silence. I’d love to hear their explanation to the judge: “Well, your honor, we were being silent and refusing to speak and do our job in support of a political event for gays. And they weren’t playing fair. They talked!”