GoalAvoid having any photos taken of me. If shots are taken hide my face.
ResultCameras are everywhere nowadays, and it is close to impossible not having a photo taken of you. I did hide my face at several occasions, but not all the time. I also forgot to hide a few times.
With pictures taken of you, and "tagged", Big Brother will know what you and specially your face look like.
What I will do
I can't hide from all photographers. I actually like having my picture taken. Big Brother also already knows what I look like. Face recognition software is a reality, and it is hard living a life where your face never is tagged on Facebook, Google+, Instagram or what have you got.
Wearing a caps is a nice and simple way to hide your face.