If your xh truly wants to contact your daughter, he will find a way to do it.
FB is an easy target for the wife or any of her friends to post stuff on it and yes, they are hoping your daughter will share the info w/you and create a change reaction of sorts.
Take it down...both of you will feel better for doing so.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
