My great grandmother use to tell the tale that after the 1920's great depression, hobo's riding the rails would stop at their back door. She lived two houses down from the main rail interchange in a major midwest city. The trains pulled in, stopped, the men (and some women) got off the train they were hoboing on, and roamed the nearby neighborhoods begging for food.
My grandmother always tried to give them something to eat, but only peanut butter and jelly sandwiches. And only kool aid to drink.
If any house gave out meat sandwiches or milk, the word got around and that house would have a line a block long of hobo's looking for meat sandwiches.
Just an interesting tidbit on peanut butter and jelly during the era of the great depression.