Thank you for the request and the detailed explanation of the requirement. It would be fairly simple to implement this in Mailman 2.1, but I hesitate to do so because it opens a can of worms which is not so easy to deal with. If this were implemented, I see more requests with equal justification for displaying digest mode, and possibly other settings.
I am attaching a patch which will italicize those list names for which delivery is disabled, but as I said, I hesitate to actually implement it. I understand the patch does you no good because you want it on python.org, but even if I released it, there's no telling when it would be installed (python.org is currently two releases behind).
At this point, I suggest you do post something to mailman- firstname.lastname@example.org or possibly better, email@example.com referring to this request and asking if others have interest in this feature. Note that both this lists are 'officially' closed to non-member posts. See the respective listinfo pages. Had you joined mailman- developers before sending your original post, I wouldn't have rejected it, but any reply from me would have been the same.
Also, I completely agree that the text "Use this if you want to make the same membership option changes to this other subscriptions." is misleading and should probably say something like "Use this if you want to make membership option changes to these other subscriptions.", but changing that has serious i18n implications, and I'm not sure it's worth it.
I'm also tagging this report for MM 3.
** Changed in: mailman Importance: Undecided => Wishlist
** Tags added: mailman3