It’s no secret that everyone and their brother is suddenly into baking bread — one can’t open up Instagram without being confronted with a slew of loaf brags, many from folks whose accounts never before demonstrated an interest in the pursuit, all eager to show off their new skill. Now ABC 7 reports that San Franciscans are taking the social media concept of sharing offline, and are now sharing their sourdough starters by attaching them to power poles and trees.