A few months, a woman Tweeted to complain about the way photo of her family, originally posted on Facebook had been shared on Twitter. She Tweeted: "Digital etiquette: always ask permission before posting a friend’s photo publicly. It’s not about privacy settings, it’s about human decency." The woman was Randi Zuckerberg, a former Facebook executive and the sister of its co-founder and CEO. It struck many people as a little odd that one of the Zuckerbergs would object to photo sharing on digital media and would assume that the rules for it are spelled out somewhere. The rapid evolution of digital life has thrown uncountable numbers of monkeywrenches into the traditional engines of politeness, and the Zuckerbergs are, of course, much more the authors than the victims. Today on the show, new manners for digital life. Leave your comments below, email us at firstname.lastname@example.org, or tweet us @colin. We apologize to Deborah King, President of Final Touch Finishing School, for cancelling her appearance on the show at the last minute.