I realize security is a serious issue after Boston. And I'm all for public safety. So if the city is going to ban backpacks at Bay to Breakers , (just for runners, or for spectators, too? How can that be enforced?), we might as well take the next logical step:
More naked runners.
Run naked and you can't hide a bomb. Run naked and you are no security threat to anyone. In fact, public nudity is one of the best defenses against terrorism; have you ever heard of a naked terrorist?
Let's go all the way. The runners. The spectators. The casual passers-by, the folks who happen to live along the route .... banning backpacks is just a start. Ban clothes. All day, all along the 7.5 miles. A naked city is a safe city.
Scott Wiener  can stay home.