They already take your passport if you fall behind in your child or spousal support.
Yes very true, I was pointing this out above, and since alimony and child support are often so draconian and outrageous— well beyond a person’s realistic ability to cover such costs and not adjusted even if the earner loses a job or suffers a reduction in salary due to an illness— this sort of practice in effect represents a form of modern day slavery. I’ve in fact come to sense that this is a major reason why even so many religious Americans are refusing to marry or start families anymore, the almost Soviet level impositions of American family courts and the constraints on even basic freedoms (like travel) are making marriage these days a kind of state-compelled round of Russian roulette with a nearly fully loaded cylinder! These statist practices are an absolute outrage in a country calling itself a democracy.