The email practice of blind copy. One helpful hack in the feature is sending a standard message to many recipients as if they are the only intended recipient. When used for this purpose, it is a good feature and is a time saver.
However, this is not the standard practice. Instead, its primary use is copying specific recipients without the intended original recipients knowing thereof. It is a pitiful state of our culture that the feature exists front and center to use. Possibly it should come with a user message similar to ‘are you certain you wish to send.’
We can choose to use bcc for its intended malevolent use, and we can choose to ignore those practitioners who follow that practice. Either others are part of the discussion, or they are not. Eliminate devious and destructive habits. Quit bcc.