Spammers and scammers are not dumb and they are not idiots. They are not doing what they do to bother or annoy us or because they have "nothing better to do with their time". They are in business and they will target their "customers" like anyone else; with research.
Full story here - New Wave of Phishing Scams Uses Facebook Info for Personalized Spam
"You receive an email that appears to be sent by a friend or family member. The message addresses you by name, but the content is strange. Usually, it’s just a link to a website. If you click on it, you could end up downloading malware to your computer.
What’s going on here? The scammers are exploiting the fact that you’re more likely to click on a link if it was sent by a friend.
Scammers find your information through Facebook or other social media accounts. Some set up fake accounts and send out friend requests. When you accept the request, they can view your friends and personal and contact information. Other scammers rely on social media users not locking down their privacy settings, so basic information, such as your name, email address and friends’ names, is publicly available."