Find out if you know a guest through common friends?

Before you decide to accept a guest, do you care to know if you share common friends with the guest? Do you try to look them up on Facebook, Linkedin, etc.?

Would this information be helpful to you in deciding which guests to accept?

LinkedIn normally…but not to see if we have friends in common. just to take a look at what they do and to confirm what it says on Airbnb.

How can you do do this since we only get the last name after the booking?