I have read the whole thread. I still see no basis for assuming that they have an agenda...other than the one I suggested. Their motivation seems clear to me, the gooberment has no business overseeing the education of children unless the parents voluntarily place them in gooberment school. Period. The law may say otherwise but the law is wrong if it does.
I found response #251 to be persuasive and not in disagreement with anything I've encountered in MA law regarding homestudy (which also covers when a child opts for private summer tutoring to make up a course for a better grade).
It comes down to that education plan. If it had been submitted and there was no reasonable dialogue, then the parents might have a gripe.
If anyone here knows the parents, I really do wish they'd start a thread.