They don't. The kid is 18 and unless deemed incompetent and in need of care, the parents can just kick themselves for raising their kid to be irresponsible.
Unless you get court appointments for it, you can't. They will be an adult. Adults get to make their own choices, even if wrong. Trying to take it and not turn it over could be seen as a variation of theft. Similar to how failing to turn over a UTMA account can get you in trouble.
Dontgiveuptheshoe t1_j2f4ccu wrote
They don't. The kid is 18 and unless deemed incompetent and in need of care, the parents can just kick themselves for raising their kid to be irresponsible.