How those with less money get preyed upon
The folks at Mint.com put together an excellent graphic presentation of how lower income people get caught up in difficult situations and pay dearly called "The Shaft: How Companies Prey on the Poor." The raw deals users get with payday loans, "repair" credit cards and renting to own are detailed by the artist behind WallStats.com.
See it here. Be patient, the image is large and, depending on your browser, you might have to click on it to expand it for viewing.
It's a good primer on the perils of doing business with those who cater to those with lower incomes and the credit-challenged.