Long story short, I am from and love in the U.K but whilst on a gap year I had a brief relationship with an Australian man which resulted in a child - my DD.
He "supported" me through my pregnancy but went NC when I was 7 months pregnant and we didn't hear from him again until just after she was born when he basically said his new partner didn't like the fact he had a child with someone else and he wouldn't be in contact again.
True to his word he didn't - other than to tell me he had a daughter with this woman 2 years later.
His mother decided for a while to keep contact via Facebook and emails until my DD was around 18 months old but just like her son she suddenly disappeared off the radar.
Ignored my messages and stopped the interaction between us, even deleting me off Facebook which was our main form of contact due to the vast geographical distance between us.
Now my DD is 7.5 years old and this morning I have woken to a Facebook notification that GM has liked one of my public posts - a rant about some local scammers, not even related to my DD.
But this means she must be snooping on my profile trying to glean information about my DD... but why? Why doesn't she just ask me herself? 
I have not prevented contact and even after the horrendous way both my DD and I have been shunned by the family I have always made it clear the door was open for contact... for any of them, not just her Dad.
Anyway this sneaky profile stalking has really upset me and made me angry if I'm honest, I may block her or make all the pictures of my DD private - there's not many anyway except a couple of family shots with my DP and my children (I have a 3 year old son too).
I'm so hurt and feel she's lost the right to view this pictures. She chose not to have any contact and she could easily call, email, write a letter (she has our address)?!