I have not compared these against previously disabled-delivery cases that I reported to this mailing list, to see if they're the same and for what cause each had delivery disabled.
Generally speaking, when a Mailman subscriber's "bounce score" goes too high, delivery gets disabled (and remain that way unless either the subscriber or an administrator re-enables it). The member will, however, receive occasional reminders that the subscription has been disabled. These reminder messages will include information about how to re-enable the subscription.
"Bounce processing" -- how high the score must go before disablement, the number of reminders sent to the member, the frequency with which the reminders are sent, the total number of reminder messages that will be sent before Mailman permanently unsubscribes the address from the mailing lis, and the "number of days to store a member's bounce score" (after which bounce score resets to zero if there have been no new bounces) can be configured per-list. ISTR we leave all of these set at defaults:
Should Mailman perform automatic bounce processing? Yes
Maximum member bounce score before the member's subscription is disabled? 2
Number of days after which a member's bounce information is discarded, if no new bounces have been received in the interim? 30
How many "Your Membership Is Disabled" warnings a disabled member should get before their address is removed from the mailing list? 2
Number of days between sending the Your Membership Is Disabled warnings? 7
Here are the crop of unsubscribe advisories:
brooke@vmware.com has been removed from BALUG-Announce. (disabled address) josh@openvideoalliance.org has been removed from BALUG-Announce. (disabled address) zen@pengaru.com has been removed from BALUG-Announce. (disabled address) cnathan@perspecta.com has been removed from BALUG-Announce. (disabled address) bradc@caltesting.net has been removed from BALUG-Announce. (disabled address) pderringer@techtarget.com has been removed from BALUG-Announce. (disabled address) balug-digest-local@jupiter.com has been removed from BALUG-Announce. (disabled address) warren@delsci.com has been removed from BALUG-Announce. (disabled address) eren@sfsu.edu has been removed from BALUG-Announce. (disabled address) axs9078@rit.edu has been removed from BALUG-Announce. (disabled address) unixlists@pacbell.net has been removed from BALUG-Announce. (disabled address) ketchers@math.berkeley.edu has been removed from BALUG-Announce. (disabled address) klenahan@palantir.com has been removed from BALUG-Announce. (disabled address) rtype@wt.net has been removed from BALUG-Announce. (disabled address) wca@meer.net has been removed from BALUG-Announce. (disabled address) kdeath@alumni.uvic.ca has been removed from BALUG-Announce. (disabled address) aavasthi@vmware.com has been removed from BALUG-Announce. (disabled address) pozar@lns.com has been removed from BALUG-Announce. (disabled address) rainer.brendle@sap.com has been removed from BALUG-Announce. (disabled address) romanab@slip.net has been removed from BALUG-Announce. (disabled address) pg_balug@pgsft.net has been removed from BALUG-Announce. (disabled address) kathryntate@comcast.net has been removed from BALUG-Announce. (disabled address) keith.owen@sonoma.dds.ca.gov has been removed from BALUG-Announce. (disabled address) gravytron@speakeasy.net has been removed from BALUG-Announce. (disabled address)