As long as there have been salesmen, there have been scammers trying to sell useless products. Traditionally the elderly have fallen prey to cold-call fraud, but now scam artists are getting tech-smart, and it's the younger generation of computer users who are falling for scams.
Falling for it: youth and tech scams
Social engineering and personal security

The technology of crime is evolving, and criminals get smarter every day. But when technology proves too difficult to exploit, criminals resort to manipulating information from their targets via social engineering. This burgeoning field allows criminals to trick people into disclosing sensitive information such as passwords and bank information.