​​US media is awash with accounts of SF's horrors - an epidemic of street crime, open-air drug use, zombie-like addicts looking for their next fix, empty, ghostly office towers and stores, and a flood of homeless people. So, Musk, this time, was on the ball. Thousands of San Franciscans, on the other hand, are on fentanyl, a synthetic drug that gives a short-lived, powerful high.