THIS tradition is packed with meaning. For AA is really saying to every serious drinker, "You are an AA member if you say so. You can declare yourself in; nobody can keep you out. No matter who you are, no matter how low you've gone, no matter how grave your emotional complications. . .even your crimes. . .we still can't deny you AA. We don't want to keep you out. We aren't a bit afraid you'll harm us, never mind how twisted or violent you may be. We just want to be sure that you get the same great chance for sobriety that we've had. So you're an AA member the minute you declare yourself."