Depends on the situation. If it's just wandering around, I would probably leave them be. If they came up to me or was in a bad situation, I'd probably take them home, clean them up and post stuff to my wife social media to see if anyone's missing them.
What always cheers you up when you think about it?
Would you rather suffer extreme cold or extreme hot?
Depends on the extreme and the situation. I'd rather have summers that were 105 degrees than winters at -20 degrees, but I might prefer to freeze to death than burned at the stake.