it's too easy to unsubscribe everyone from a list by accident

Wikimedia uses mailman for all their mailing lists. Today I had this issue as reported here: https://phabricator.wikimedia.org/T302816

Basically, it's too easy to accidentally unsubscribe everyone from lists. Could you please consider adding at least one more warning that clearly says: "Clicking okay will remove everyone from your mailing list, ARE YOU SURE?". Additionally, it would be helpful to have some sort of stop button after you accidentally click on this option.

Thanks!