Thank you very much Whims and sorry for late reply. It took me some time to understand what you meant by your answer then I realized there was a link under your post... lol I have no problem with seeing these in my Analytics data, I only worry that this could hurt my rankings in Google somehow.

Moreover, I   made a very interesting observation today when trying to follow the same route as people who've been on these pages. They arrive on original page for a certain keyword. They stay on it 2-4 seconds only, then I find the same visitor staying on the same page but with ?fb_xd_fragment= at the end of URL for a few minutes (obviously reading). I checked three visitors only, but I think it is enough to consider this a trend. This suggests two things:

1. This stuff is likely to happen when visitor clicks in from Google then immediately refreshes the page for some reason (this is why these pages are NEVER bounces)
2. People obviously read, so they don't see blank pages like we do when we try to click on them from our Analytics account

I know the solution would be just to get rid of all that stuff on my pages, but visitors love Facebook. They share, they comment. It just ads to the experience. I will go for risk of keeping it for some more time and I will try to find out answer in Facebook developers forum too. If I find a solution I will sure post it here for others to benefit. If anyone has any ideas or suggestions, I will also appreciate.


Thanks a lot,
Elena