That was my first reaction too- but we don't know exactly who leaked this to Mitchell. Besides- the 11th and 12th Traditions speak to OUR maintaining anonymity- we don't find anywhere that suggests we expect others to maintain it for us.
There are some in the public eye who have driven me to distraction with talking about their recovery (Beck comes to mind) because they do NOT speak for me or you, or AA/NA as a whole and often do more harm than good.
It can. I try to relate little bits of my story here and there but mostly to stress a spiritual principle to someone who seems to need it. I have (seemingly -- I am out of the Results Business) helped a lot of "Earth People" this way, and it's my motivation: How can I best serve this person?
Haven't heard a lot of Beck talking about this, but if his story is short, and he has a clear motivation to serve -- and, of course, if he does not break anonymity of others! -- then I might not be too upset. You remember what they say at the meetings: I can say I was here, but I cannot say you were.