My friend always posts party photos. How do I tell her to stop?

This week, Delia Cai tackles the social media etiquette around group photos and party invites.

There are certain social media rules we can all agree on: Ghosting a conversation is impolite, and replying “k” to a text is the equivalent of a backhand slap (violent, wrong, and rude). But what about the rest of the rules? When is it really okay to remind someone of our old Venmo request? What happens when someone tries to flirt with you on LinkedIn?