How to avoid being ripped off by scammers.
Don’t be greedy. Don’t be dumb. That pretty much covers it.
If an arabian princess emails you telling you she got your name from a friend, and needs you to help her smuggle $20 million out of Egypt, and she’s willing to give you $5 million for your trouble, and you reply, and end up sending her $10,000 to pay bank fees, are you an idiot? Yes. Are you a greedy idiot? Yes.
If you are selling a car and someone sends you a cheque for $2,000 more than the price of the car and asks you to wire $1,000 of that to a friend in Brazil, and you do, are you an idiot? yes. Are you a greedy idiot? Yes.
Also, don’t buy software from anonymous sellers in China.