I can relate. Soon after I refused my ex-husband's friend request, and blocked him, an innocent request appeared among several others, a common happening for me because I play several games on Facebook that require "neighbors." Since I had my ex-husband blocked, I could not see that he appeared in this person's friend list. I accepted the request, and over time I noticed that this person did not continue to play any of the games in which we were "neighbors," but did quite a bit of commenting on my status updates and writing on my wall. Just casual chat, as I do with many of my Facebook-only friends. Ever so gradually he showed more and more interest in my personal life, and it started to give me the creeps. At that point my daughter confessed. He had sworn her to secrecy, but that person was my ex-husband, using a false name.

I immediately blocked that account too, and I requested on my page that all incoming neighbor requests please tell me where they know me from and what game they play, or I cannot accept, since I had been duped by my ex-husband. Eventually another friend request came in, dutifully assuring me, "I am not your ex." He was connected to several Facebook friends I've had for years, who are known to be safe. Stockholm, Sweden, of all places, is what this guy showed for a location.

After I accepted, same pattern. No neighboring in the games, but awfully interested in my status updates. It didn't take me long to develop suspicions. He knew a little too much about me for some perfect stranger in Sweden.

Note that when you block somebody, it's as if their account ceases to exist. You can't see their page. Their name won't come up in a search. You can't read posts they make on anyone else's page, and they won't show up in anybody's friend list. So, I looked at the "Swedish" guy's page through my current husband's account. My ex was a "friend" of his, AND so was the false account he had created the first time. Confronted, he confessed. Yet again, he had created a false account so he could keep in touch with me. (And Stockholm as a chosen false location? The symbolism of "Stockholm syndrome" is not lost on me!)

I alerted all of my Facebook friends who were connected to him. They were innocent and had only added him as a game buddy, and upon finding out the truth, they all deleted him. My brother, who had also been connected to the two false accounts thinking they were two friends of my ex-husband's, was furious and went public with the fact that the accounts were fake. Facebook itself was notified. My ex has been informed that any further attempts to contact me in any way will get him arrested and charged with stalking. So far there has not been another problem.