He's 22, not 9.
Sure, "call the police" works if there's not another answer or you live a sheltered life, but to me, this is the very reason that communities are failing.
People can become even more concerned to win their parents approval as they grow through adulthood.
When I think of the things I've done as an adult that I'm least proud of then I wouldn't want to tell my parents about them.
As a child with no experience you've got an excuse for your mistakes. As an adult choosing to scam people the only places you've got to hide seem to be anonymity and sociopathy.