That's an interesting point. I think that's a different sense of the word "anonymous," though.
There's a strict sense of the word "anonymous" that is from the tradition of writing: an anonymous letter, for example, or the sense in which 4chan users are anonymous. It means "this person has no unique identity at all, other than what one can infer from this written word." This is the kind of anonymity that e.g. Facebook has fought against with their policy that accounts should have real names.
There is another sense in which "anonymous" is used that is common to all kinds of secret societies, though, and that is simply public anonymity as a member of the society. You don't wear a pin or make it known that you are an active member, except maybe to specific individuals that have need of that knowledge. But within the society itself, you very much have a distinct identity.
That isn't how the anonymous part of alcoholics anonymous works. The twelve traditions lay out a better explanation, I think, but you are not totally anonymous in the group meeting, use of first names only when speaking and interacting, but friendships evolve from that.
i feel like it would be easier to retain anonymity in VR vs a physical location where you could be recorded in, or have your car spotted, or have any of the other participants remember your face.
"Anonymity is the spiritual foundation of all our Traditions, ever reminding us to place principles before personalities."
While it is easy to take the word anonymity at face value, in my opinion as an alcoholic active in AA, anonymity as it is mentioned here in tradition 12 deals more with ego and pride. When you walk into a meeting, you leave "what you are" at the door and walk in as "who you are." This translates into practices of not using honorifics. A judge isn't "Your Honor" at a meeting. A priest isn't "Father." All are equal, and all are just one drink away from being drunk. Thus, placing AA's principals before our own personalities.