> Even if you’re extremely cautious, even if you never post anything on Facebook, even if you have “location services” disabled on your phone at all times etc. etc. Facebook still knows where you are. You can’t stop other people from taking selfies in an airport.

This seems a bit over the top. What are the odds I'll end up in the background of someone's selfie that they post on Facebook? I imagine the chances are incredibly small. And if I choose to take a picture with someone, I just have to be aware that it may end up on social media and be OK with the baggage that comes with that.