This was what I meant with “atitude”.
Also, there’s the thing about how much time each one of these people spend to take the “necessary” number of selfies, so they “look good”, the work of art is in the right place, there’s no other phone blocking anything important… it’s not just a second or two. And then you multiply it by the number of people. Then you add the fact that most of these people are only concerned about themselves, so they will stumble on you, even push you if they feel like… just to prove in the damn social network that they were there. “Hey, look, I saw Mona Lisa!” Yeah, you and 8.86 million people this year (24.2 thousand people a day, on average). How unique are you, snowflake?
I, for one, seldom take pictures in museums. It makes no sense. I leave my camera in the bag, in the locker at the entrance. Sometimes I see an interesting situation, in a calmer place, where I can just get my phone and take the shot without getting in other people’s way.
But then it’s just me, my way of doing things and my opinion.