It appears the singleness of purpose has gotten a little complicated. However, it remains clear that we should not censor drug addict alcoholics in meetings (within time limits). We allow them their recovery and ability to share their experience, strength and hope. Here’s a quote from the article published by the general service office of AA.
“In a presentation at the 1983 Conference entitled “Are
we helping the dually addicted?” delegate Dyanne G.
described the way her group welcomed her. “I will continue
to thank God that I came into an A.A. group spiritually
fit enough that its members did not find it necessary
to censor my conversation or actions in order to
protect themselves. I did talk about drugs, and I used a
lot of four-letter words to do it! My group allowed me
the dignity to choose to change these things and the freedom
to do it when I could, not when they thought I
should. . . . My group seems to have no trouble sticking
to our single purpose, which is to carry the message to
still-suffering alcoholics, however damaged and confused
they are in the beginning . . . . There is a fine line
between upholding our singleness-of-purpose Tradition
and limiting or restricting our membership. The day
A.A. appears to be rejecting people who may be alcoholic,
we will begin to die. What good will it do us if,
while we are defending our ‘rights,’ A.A. is destroyed?”
SEE GENERAL SERVICE OFFICE OF AA ARTICLE ON SINGLENESS OF PURPOSE HERE