Way back in uni there was a distribution address with all the emails in it. To protect it, students weren't supposed to know it so they put it in the BCC field.

Way back in uni there was a distribution address with all the emails in it. To protect it, students weren't supposed to know it so they put it in the BCC field. Except of course once, they forgot. Much hilarity ensued. This was also back when you could still send an email using any from address you wanted, though I can't remember if anybody used that combo.