Understand your frustration, but that is not a MailChimp issue. If you are the list creator you can turn it off through the List > Settings > List Name & Defaul

Understand your frustration, but that is not a MailChimp issue. If you are the list creator you can turn it off through the List > Settings > List Name & Defaults option screen. There are two fields there. The first is to send them to your list members when they unsubscribe and the other is to send them to you. Leave the email blank if you do not wish to receive unsubscribe notifications as the list owner. Unfortunately if you are on the receiving end and not the list owner, it is up to the list owner to turn them off and there is not much you can do about it.