I wanted to try it but I couldn't even get it to work between my and my wife's watch (or my friend's for that matter). It simply doesn't work.

But yeah, I wouldn't see me using this function for the reason you mentioned. It's "too wild". Perhaps now with the user profiles it would be possible to not allow messages when you're in certain modes (like "work" or "do not disturb"). Can you do that or does it have to be always on?