When all else fails show them the program button and the auto focus setting - then help them understand:

have a subject
draw attention to the subject
simplify the image

Some people were made for auto cameras - they can still learn to see a good image and compose it well. That would be a big service to them. ---- of course if simplifieing the image means to through the backgound out with a long lens and a large aperature ,,,, well - I guess they may as well go digi - at lease that way they can erase the bad ones! - Frank