In some countries there are Bitcoin machines where you can exchanghe Cash and Bitcoin. Would you use this machine or rather buy your Bitcoins in the Internet? 
If people are using these machines and are successfully earning Bitcoins from them, I don't think so there is any harm in using these machines. Rather these machines should be made common and place all over those countries where Bitcoins are legal. Currently Internet is the most common way of earning Bitcoins but I like this concept of Machines.