It’s been shown in several studies that constantly taking photos of events dramatically reduces your ability to actually remember them (http://www.dailymail.co.uk/…/Want-remember-event-DONT-photo…)
So Rijksmuseum tells you to put down the cel phone. They give you a pad of paper and pencil when you enter the museum and encourage you to draw what you see – to help you experience the awe and wonder of art. They even blog/post people’s drawings.
I, for one, approve.