A good friend got one. Checks it constantly. He has slipped down the slope of constant surveillance. Cell phone buzzes while we are out..."let's see who is visi

A good friend got one. Checks it constantly. He has slipped down the slope of constant surveillance. Cell phone buzzes while we are out..."let's see who is visiting the wife?" Let's listen in on how she's interacting with the kids as they play in the driveway. It makes me uneasy and any suggestions I have made jokingly or seriously about it being weird are brushed off. I genuinely feel it straining our relationship as he turns into this other person every time he checks in on what's happening.