Cell phone is worse because its with me everywhere.

I consisently get facebook friend suggestions for clients I have no friends/nothing else in common with outside of being at their house. I wasn't checking in on them and most don't even know my last name to waste their time checking in on me. The only thing I can figure is it's because I was in their home.

I understand most that most websites have tags to track you and start to advertise if you hit their site, can't figure the facebook one out though.