I usually butt in and say "Yes you do. You have a really interesting Facebook page. I made it for you. My Photoshop skills are top shelf so I really hope you appreciate it."
It never fails... Since they know me, my skills and my sense of humor they usually go and create themselves a Facebook account and I get a friend request that evening.
Life is fun.
Look me up as esxmarkc at swbell dot net on Facebook.