When my grandchildren were young, I banned phones and toys at the table. Even now, many years later, they still keep their phones away from the table.
What really bugs me, more than actually hearing the conversations does, is the fact that if you look around in a restaurant, you will see that most of the tables have phones in view on the table! Can’t the diners just put them away for a little while, or do they think they are so important that they can’t afford to miss a call? You’ll see people who go to sit at a table but they have to put the phone right beside their plate before they even sit down! Why? I would not be impressed if someone I was dining with stopped chatting to me, or eating, to answer their phone. So rude!