I'd unblock him. I mean I'm not seeing or reading what you are on his FB wall, but it doesn't sound that bad to me.
FB can be a good thing for us DBers if you use it right. If you are actively GALing, you can use it as a window for your H to see all of the fun that you are having and that you are just fine without him (remember, acting 'as if' here)...
Unfortunately, FB is also a window into what your H is doing. I think that this is a personal call Chrys. If it is too painful, then shut the blinds on that window. If it isn't that bad and you can take it, then leave the window there. In some cases, it is the only connection bw the LBS and the WAS.
For me it hasn't been bad. I used it to post some pics and words about some fun things that I was doing. I didn't go overboard, but my W did make a couple of sarcastic remarks to a couple of pics back in December. On the other hand, my W did not use it to abuse me. She didn't post anything on her FB account that she wouldn't have posted while we were together AND she did not change her status from being M'd to S or 'it's complicated' or 'single'.
Tough call Chrys. But this doesn't sound too bad to me.
BITS Denver
M 43 X 38 T 13 W moves out of home 11/2010 Roller coaster from hell 2/2011-5/2012 I request divorce 5/2012 W moves home 6/2012 Good time 7/2012 - 1/2015 I leave 3/2016 process of divorce