Apparently, it's legal to carry a handgun openly in California provided it's not loaded. Now that had to have been a late night legislative compromise.
So some San Francisco residents are exercising their rights. Source: csmonitor.com. Excerpt:
"I looked into concealed carry permits, but unless you’re well-connected it’s impossible to obtain,” says Mr. LaTour. However, he says, “I personally prefer open carry because of the visual deterrent."
They are part of a group of people called Bay Area Open Carry Movement.
People have many diverse reasons for carrying a firearm. "Personal protection" and "exercising a right" are the two main reasons you are likely to be given if you ask a "UOC'er" their reason.
All are welcome here. Please look around, follow links, do your own research, then ask yourself if UOC is right for you. If not, you can always say "to each their own" and sleep soundly knowing that there are other lawful individuals out there who will be looking out for themselves and their neighbors.
Yeah, now there's a neighborhood watch. As their website says, "Carry on!"