The institutional advice would struggle to directly recommend any other action as it can only be seen to create an unconstrained liability - if not legal, then social. That does not mean they wouldn't be amenable to a system of placing people who were vetted and managed if they were sufficiently convinced it would resolve the issue (at institutional scale).

Its worth noting that the homeless person in this situation was in fact known to those who provided the home - and not as casually as the first para suggests.