A little Bookcrossing detective work

Yesterday, I was looking at the list of people who had included me on their Bookcrossing friends list, when one name jumped out at me. I didn't exactly recognize the screenname, but it was very similar to the name of someone I know in RL. Curious, I looked at this person's bookshelf, and discovered that his wife was also a BC member, as was his mother and bother. I found some other clues in some of their journal entries, and by yesterday evening, I was virtually certain that this member was the father of one of my younger daughter's friends. Now, I'm not sure if he put me on his friends list because he knows who I am, or just because I'm one of the more active bookcrossers in his immediate area. One thing for sure...I'm definitely going to mention BC the next time I see him!