Methods to run ichat or adium but not to log on automatically

Apple ichat and Adium chat software are automatically logged in as soon as they run, with 2 questions:

1, a few people share a computer, "automatic landing-exit-Re-account login" is very troublesome;

2, only want to see Ichat/adium records and other things are not necessary to log in, be harassed also very uncomfortable. Here's a way to run Apple ichat or Adium without automatically logging in.

Press and hold the "Shift" key + click on the Apple Ichat/adium icon to start the Ichat/adium without automatic login. Easy, ^_^, Apple philosophy: Simple is good.