You can either be sitting in a seat or you can be standing, you can't be both. The people calling them "standing seats" are ridiculous. They're seats.
I don't understand why these are called "standing seats"? You sit down on them......they're just seats.
On my face in bed? Many times haha. Apart from that almost never. Have never cracked a screen or body of a phone, touch wood, in 20 years or whatever it has been of having smart phones.