Devils Advocate... why is it horrible behaviour from Facebook? It's their product which needs to be paid for by Ads and they need to prevent Ad Blockers from stopping these from being served. So in their defence - any technical work around is fair on their part.
Nobody forbids them to put ads. However, there are laws (not even talking moral here). If you explicitly download a tracking blocking extension, you want to opt out of tracking, which is required by law that they provide.
What I am saying is that not only they track you, but they explicitly break the top extensions that fix this. From this point of view, I have no regret for any of their ads being blocked.
