  Jesse, Your dad has a point... things should be planned ahead of time. However, plans often change, and cell phones make it possible to do things that never would have been possible without them. Like change your plans last minute, find your friends in a crowded area (like Community Days) or go on the ZMYG Road Trip. (That wouldn't have worked without cell phones. ) So yes, it pays to plan ahead, but it also pays to have a cell phone to allow for greater coordination. 
