This is an interesting topic to discuss. It is a gray area and there doesn't seem to be a solution to the problem of some addicts not really belonging in AA but going anyway. We have no central authority to mandate a solution. But AA meetings and AA groups solve the problem themselves, by establishing a policy or a culture that deals with the issue, giving guidance on what to do.
I don't mind addicts coming to AA meetings as long as the singleness of purpose imperative is maintained. At a meeting I attend there is one guy, with a little over a year sober, who introduces himself, "My name is John and I'm an addict." I observed him get sober, share often, and chair our AA meetings. Nobody seems to mind and John is an asset to the group.
The meeting and the group say, basically, that it's OK. Even though AA is not really for John.
Now, things would be different if he showed up at the Friday noon AA meeting at St. Timothy's church . . .