Mailing lists are great when your solution to low effort. Spam reports is to ignore them till they go away because people are generally lazy. Sadly falls apart when the barrier to entry for making a report has fallen through the floor.

Mailing lists are a really shitty way to do things if you need to actually deal with complex management problems. Like the one at hand.

Cuz they fall apart the moment. You start getting large amounts of people acting in bad faith or even acting in good faith like total idiots.