Not on the Visa's they had.There's a bit of logic missing from your scenario. If they had access to a job like that in Hawaii, they could have simply given the address of the homeowner they would be staying at and CBP would have been forced to let them go instead of giving them the requisite cavity search for not booking a hotel.
Ah ha...Hostels, presumably the cheapest one they can find always have to be booked ahead of time to insure rates and availability. No one is flying into Hawaii with no hotel bookings, looking to walk into a "cheap" hostel at the peak of spring break, ffs.
CBP did their thing on arrival, sending them to an ICE detention center is a whole new ballgame.It's not a rule. But if you arrive in the US without hotel bookings you'll be questioned by CBP, but this has never been an excuse to strip search, lock up and then deport someone.
CBP doing their job like they did even before Trump.
Get a grip.