E-mail: Anonymous or Revealing?

When I write a letter, I go through a process. I sit at a keyboard until I have finished my thoughts to the person or organization, then I take the printed output and fold it, put it in an envelope, place a stamp or two on the envelope, and add a return address. Then I post my letter. Enter e-mail: I cut out all this except the keyboarding! I can sit at my keyboard, type my thoughts as they come to me, and CLICK! The message zips out into cyberspace to the recipient(s).