Photography is a fun hobby for many people. It is an experience itself. And who cares if people are posting on Facebook and Twitter. I enjoy looking at my friends vacations and get ideas for things to do.

But I agree with you on concerts, that is just rude to take photos while ruining the view for people behind you.

And I love this project. It seems a natural project for any photographer parent. I am sure we will this more and more. Not obsessive at all.