Correcting myself:
I also removed the text from the list descriptions that indicates whether or not the roster is available to all subscribers.
Well, I'm putting it right back, after sending this mail, and changing the rosters of balug-talk and balug-admin back to subscriber-accessible, for reasons cited. I'll readily admit to feeling strongly about the latter point, but it's the fruit of very long experience as a listadmin.
Apologies: I mistakenly thought you were saying you had removed the entire feature of roster access (which one _can_ also do). You merely meant that you'd removed what produces the phrase "This is a hidden list, which means that the list of members is available only to the list administrator."
I actually do think that such standard advisories should be left in place, because that's where people expect (from familiarity with Mailman elsewhere) to see what the policy is -- and so that people are not surprised.