@croydon - It's also dangerous for everyone connected to the person. A couple of times I've been contacted by my "friend" telling me that she's been mugged and needs me to send money. Of course, when you send a text message you realize your friend is perfectly all right, except that they've been using the internet in an insecure place and let hackers get into their email.
So, even if you think it's OK and you're willing to shoulder the risk, remember that you're putting everyone you are connected to at risk as well. Most of the time the bad guys are easy to spot if you're tech savvy, but will your grandmother be able to spot them?