This was an inevitable outcome because it was only a matter of time before large companies started foiling ad blockers and their rule sets. We're now entering the cat and mouse stage on a grand scale. A lot of people seem to think ad blockers are impervious and can quickly be updated to get around any countermeasures. Unfortunately, it's very easy to get around the rule sets for ad blockers and I suspect the method Facebook is going to use will be unblockable unless of course you want to turn off all images on the site and degrade the experience.