I saw some of these websites and they are pretty persuasive, sadly.
The USA.gov site has these tips for spotting frauds:
The potential employer says you can make fast money working from home.
You are asked to pay money to the employer up front.
Emails from the employer are full of spelling and grammatical errors.
The employer asks for personal and bank account information upfront.
You are asked to transfer money through Western Union or MoneyGram.