I had a fake name on my account, but all of my real life friends knew what my name on Facebook was. I liked this system as it allowed me to connect with my frie

I had a fake name on my account, but all of my real life friends knew what my name on Facebook was. I liked this system as it allowed me to connect with my friends without worrying too much about my name and data being out there. Eventually Facebook said I had an invalid name and needed to change it. So I tried changing it to another fake name, which was rejected. I tried several more, including perfectly normal names and all were rejected. Not even abbreviations were accepted, it had to be my full exact name. Facebook knew what my real name was. Later I realized that there was a feature asking you to type in the name of your friends based on their profile picture as a security measure (perhaps for account recovery?) anyway I suspect this one way they may have flagged my account. If friends recovering their account typed in my real name enough times, but got all the other names correct they might flag my account.