DA, you seem to bring up Genesis 19 a lot, and it's not really been answered by anyone.
To be as simple as possible; you've twisted the story into something it is not.
When a child does something well intentioned but ignorant, a good parent recognises and rewards the good intentions, then later chides the poor execution of them.
Lot shows obvious good intentions in welcoming the visitors into his home, and in trying to protect them, but then shows some rather bad morals in offering his daughter.
So it is quite reasonable to say that God, as a good parent, rewards Lot for his hospitality at least enough to spare him from destruction.
This aside from the obvious fact that we only see a brief snapshot of Lot's life here; and certainly not enough to decide whether he would class as a good man or not.
