It actually takes a smart person to sell you a faulty services so you can say their aren't smart, you actually should not blame the business man alone if you get any faulty goods but the manufacturer of those substandard goods and also the government that lets then keep running. Every country should have a body or institution that are in charge of making sure that substandard goods aren't in the market.
I don't know where you manufacture your statistics but it is not easy to do business now successfully especially now that the global economy is not as it use to be and many people are actually doing the same business or very similar.
Very true buddy. For someone who is dumb to sell a bad product to a buyer successfully without the buyer noticing is as a result of two things. Its either they careless on what they are buying or they are not paying close attention to things. Although some sellers can be very tricky when they know the good if bought cannot be returned. But that is not a good way of doing business, in the end i can say they are foolish because no one return to buy anything from them again. They will lose customers faster than other trustworthy buyers.