Then surely the answer is outreach to those who take shelter there, and offering, with insistence if other options fail, alternative housing, including with supportive care for addictions and mental health.
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In all seriousness its a very bad take to suggest the answer to a given facility or service being 'misused' is simply to close the facility.
On that basis why run transit at all since some take shelter in trains, and streetcars in particular?
Why have bus shelfters, since some live in them?
Why run Emergency Rooms in hospitals, they are 'misused' by those seeking shelter, those seeking attention, those whose addictions ought to have been treated, those seeking opiods, those who should have found family doctor (not that easy, but I digress).......
Oh, wait a minute.......you mean you might need one of those? That's right.............the alternative to misuse is corrective action, sympathetic where possible and merited, and perhaps, a harsher response for those willingly, and consciously abusing the system.
But shutting down the service is no less absurd that shutting down the power grid because it powers some illegal grow operations..........