Smart phones can be 'dumb-downed'. Disable/remove the apps that are causing the anxiety and stress. If children have phones there should be an 'administrator' function where the parents can set up a 'safe' phone for their children. This should be done in conference with the children and parents...
Please re-read my comment. A street is a public place, so is the Ekka. I will repeat, just for you, 'You have no 'Privacy' in a 'Public' place! You choose to be there. What have you got to hide? Don't sling off at me, if you have trouble understanding this.
First and foremost, if you are not doing anything illegal, then you have nothing to worry about. Secondly, you have no privacy in a public place. You choose to be where you are and it is up to you to accept entry conditions or not.
I have parked like this a few times, but then again, I do it when I park my Winnebago (5m x 3m.) and then usually at the far end of the car park that is unused, so I get the long walk. However, if I see this sort of parking I have a printed sheet in my glove box that I put under their windscreen...