I am fuming at the moment.. was going to start a thread, but here seems a good place to rant.. lol..
Background. I am wife no.2.. wife no.1 was divorced from my husband and remarried, before me and him started seeing each other.. and she professes to hate my husbands guts.. she has slagged him off to their 3 kids for the last fifteen years (me and him have been together ten and married for 9 of those now)..
I did get on with her for a few years, mainly for the sake of the kids, as they moved in with us when they were teens, because she was moving to a different area with her new husband, and her youngest kid (from a relationship after she left my husband).. but as soon as my stepson became a dad, she became insanely jealous of me, because I saw the baby (who is now 5) more than she did.. we live a mile away, she lives 100 miles away.. go figure! lol!!
Anyway, I dont have any of my stepkids on facebook, simply because of shit stirring that has gone on from the ex, who was reading my profile using the kids facebook pages to see it. My husband still has his kids on his facebook though, which is fair enough, and of course me and husband are friends with each other on there.. and MIL also has the kids on there, as its her way of keeping up with what everyones up to and she enjoys seeing photos etc.. the ex isnt friends with any of us on facebook, but again is friends with her kids, and at one point she had me, husband and MIL blocked so that nobody could see anything at all that she wrote on the kids walls. Which suited us all just fine.
Eldest daughter got married recently and suddenly the block has lifted, so husband can now see all her comments, which are mainly about how much she loves them, and how she was so pleased to be able to organise her daughters wedding.. (my husband was completely ignored to the point of the ex wife even walked her daughter down the aisle!).. and its so obvious she is only letting him see the comments now so that he can see everyone praising her for how wonderful she was to do it all... 
My MIL asked me sort her facebook out today to check her privacy settings and the first thing I saw was a wedding photo.. of my husbands first wedding!!! the ex has scanned it in, titled it with "lovely memories" 
she has tagged it with one of the kids names, so that it will come up on MIL's newsfeed, and my husbands.
I know she is only doing it to wind me up.. but it really has fucking annoyed me. Husband isnt home from work yet, but I know he is going to be fuming about it too.