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 can we really remind someone of our old Venmo request? What happens when someone tries to flirt with you on LinkedIn? Fortunately, terminally online writers Delia Cai and Steffi Cao are here to answer all your digital quandaries, big or small. Welcome to Fast Company ’s new advice column, Posting Playbook .

This week, Delia Cai tackles your biggest questions about Slack etiquette at work. My coworker keeps DMing me political content on the company Slack. How do I politely ask them to stop? Straight to the DMs? That is aggressive—but then again, it’s not so different from getting cornered in the breakroom by an overly enthusiastic colleague who’s on their third trip to the Keurig.

Think of these DMs as the new equivalent of those run-ins. Now, in the age of remote work (and Slack, which, for the better part of the last decade, has reliably turned even in-office days into a matter of messaging quietly at your desk), unwanted DMs from your coworkers are part and parcel of modern workplace dynamics. But unlike our corporate forebears, who got sucked into unwanted conversations more often than any Greg Daniels-inflected fantasy would want us to remember, we at least have the luxury of ignoring such overtures.

What I’m saying is that you can .