There's a big difference between using your own children to grandstand about your personal political beliefs, and choosing to sell arms to known violent crimina

There's a big difference between using your own children to grandstand about your personal political beliefs, and choosing to sell arms to known violent criminals (which is, I presume, what you mean by "become an arms dealer"). > an overall injustice. An injustice done to whom, by whom? I understand there are tragedies of the commons, but it seems to me that charitable giving or basic activism will solve the tragedy better than some misguided idea that you should weigh a perceived social good (the specific kind marketed to you by activists in the school system) above a known affinal good; and this can be accomplished without lowering the standards for your own children's education. I get that the differences in level of funding in a catchment/district sometimes seem unpleasant, but I don't see how they're unjust. To me it seems this is akin to lying to your children to make strangers more comfortable. You have no obligation to do it, and your kids now have the right to resent you. If it's a legal obligation, that's maybe another matter, but as of now there is (in most places) no law stating that people from a given school district should send their tax money to a different school district as a function of their means; and most states don't impose serious restrictions on how the district/catchment boundary lines are drawn.