Why do people sign emails with names or initials that you've never heard of, nor refer to these people by? My friend Erin signs all of her emails "E", Jen signs them "Jay", and my mom's emails all come in with her full and last name. WTF is this?? Erin, I've never called you 'E', Jen- I've never called you "Jay" and Mom, that's your name goddammit- it's just Mom! If nicknames/shortened-versions of names are trying to be implemented, I would like notice first and then we'll talk about whether or not you're 'initial worthy' for future reference.