Regarding #1, oh goodness gracious, this just makes my brain want to explode. Similar to this, except kind of the opposite, when I'm socializing with someone, I make a point to silence my phone and check it when I excuse myself to the bathroom, or if I'm expecting something important, I'll leave the sound on and look at it long enough to see if it's the important thing I want, if not, I ignore it for the moment and respond to it later. Most people know this about me and don't take offense if I send a call to voicemail or don't reply to a text message immediately, but there are a few friends who just never seem to get this and expect that if you have a cell phone, you WILL be available at all times, no matter what. These friends are also the same friends who will stop a conversation to check a notification and don't see why it bothers people.