They could be a law-abiding homeless person. You know: someone like you, maybe, that lost their home to their wife in a nasty divorce.
Or maybe they comply with the court's orders, because they don't want more severe sanctions? Fact is, some states seem to manage without throwing people in the can as soon as possible; some states use incarceration as a last resort.
[Sorry, upthread person; I wasn't trained on US constitution. As far as I'm concerned, jail, prison, penitentiary, reform school are all the same as incarceration. At least for the purposes of this discussion.]