Without barriers the British still know how to queue!

Yeah, but still same question: why?

But there is no room the top picture for barriers

For upvotes/likes. This is the Internet. People have literally dangled their baby out of windows with the caption: 1000 likes or i drop him

You make no sense

http://nypost.com/2017/06/20/man-dangles-baby-out-of-window-for-facebook-likes/

What dose this have to do with people standing in a queue?