I agree that they're stealing - or at least extorting - the property of congregations who try to leave. My old congregation has dwindled to a few dozen, and I doubt they have the energy or strength to try to leave the PCUSA, which already knows the church has a $1 million+ endowment. So if they tried to leave the denomination, they'd have to pay a whopping "ransom."
PCUSA is all about money and progressive politics - not the Bible.