In todays world they are just a part of everyday life, so it doesn't bother me too much that everyone has theirs with them on the course. But... if you are going to play with me put it on SILENT!!! Not vibrate!!! Nothing worse than the vibrating hum coming from the front of the cart while you are teeing off!!! I don't have a problem with someone having to make a quick phone call between shots as long as they aren't holding up play and respectful to those who are hitting. Some of the people I play with need their phones for work or have families that may need to get in touch with them. Many of them even apologize for having to make a work related call. Just get to the point and keep it a short call, some of us are trying to play golf.