I blocked WW as soon as she took down 'married' from FB. I unfollowed mutual friends who leaned closer to her (luckily there were not many of those). This helped me stay away from her page, haven't looked at it since August I think.
The one odd thing I didn't do was unfollow or delete her family. That was tough for me... I love them a lot and they never treated me any differently after BD. I didn't see much about her from them and I am sure whatever they saw about me was being fed back to her. I wasn't a big FB user in terms of posting stuff but I get tagged in pics and comments. I think it was good for them to see me living my life and I think the fact that my WW could not check up on me herself was good.