Stop! Is That San Francisco Poop on Your Flip-Flop? J. Frank Wilson on Jul 13, 2018 (Updated: Sep 18, 2022)San Francisco's poop problem is getting worse. Wearing flip-flops or open-toed shoes in the city is not only a bad idea, but could be dangerous. Read MoreStop! Is That San Francisco Poop on Your Flip-Flop?