I was listening to the show this morning and have a solution for the kitten under the hood for the lady who drives 150 miles rt to work each day North of Sacramento.
Open a can of very stinky tunafish - NOT cat food. And open it right there by the car so they hear it being opened, and lure them away from the car with it. Hopefully this won't be a regular occurrence, but maybe if you did this every morning and got them away from the car, they would go to the spot where the tuna (eventually switching to cat food) is served! Meow!
(I learned to do this luring my cat out of a cistern under a house I was living in at one time)