Did you know the last gun shop in San Francisco closed?

A city ordnance requiring the video taping, and forwarding of all transactions to the police, regardless of whether a crime has been committed. This isn't (just) a 2a issue. This is a 4a issue.

Glad I don't live there.

That means the population will have to go outside the city to purchase weapons to defend themselves. And the bad guys will continue as usual. It shouldn't take long for the crime rate to increase.