Geez ! Best thing to do is act like that person doesn't exist. Say nothing, respond to nothing. Typical Facebook. Just block her off and forget about it ! Capisce'?
Am I being cyber stalked? I blocked a girl off Facebook for creepishly asking me questions about my life and she made a new one to view mine. Recently I found out she wss following a lot of people I follow on instagram
It seems like this question was just asked in the past day or two. If you're on social media, this kind of crap is going to happen because people are weird. Block whoever you need to and move on with your day. Just because someone follows the same people you do doesn't mean you're being stalked.
You could turn it around and say you're the one that's following the same people they are. You can't control this except if you exit from social media. Then you don't have to worry about it.
You would need to worry if you're receiving threatening emails, posts, etc. From someone. If you are, tell a parent or contact the police.