Once a total stranger lay down in the midwinter snow on the lawn next door to us, intending to freeze. I got him up, put him in hot shower then into the spare bedroom for the night. But in the morning at breakfast I let him have it. How dare he do such a thing where my children would find him the next morning???
This was not to make friends, and it certainly didn't lead to friendship. But the next time I ran into that person he was no longer a homeless drunk and was married to a loving woman. He also looked pretty frightened of me.
Humane means get the person help. It doesn't mean coddling them beyond the basics.