I have rescheduled appointments with customers, and vendors when they are in my office and during a conversation and are looking down into their lap and interacting with a phone.........They often do not come back, but frankly I do not give a damn if they do not have the courtesy to shut off their phone, or say that they are expecting a phone call at the beginning of the meeting, which extends common courtesy. I am kind of a dick in that regard, and I was a real abuser when golfing for years when I tried to run my business on the golf course when the cell phones got smaller and smarter you finally got to the point that four people were not sharing companionship and the joy of the game.....they were working........... so thumbs up to the bowl theory!