Rarely - but, when someone does, I immediately ring them back to say, "You forgot to say Goodbye". What I really appreciate about most Americans is when I've called a wrong number, and am in the midst of saying, "I'm so sorry to have ..... " and they slam (!!) the 'phone down. Or, twits who say, "You have the wrong number" and then hang up before I can take a breath. Well - what IS the incorrect number I've reached (so I won't disturb you, again)?? Telephone Directories used to list some of the basic telephone manners but it, apparently, became politically incorrect to do this - soon it will be politically incorrect to include preparation instructions on a package of cake mix.