Is it illegal to flim someone without their permission in California?
Anne Arkey
No, it is not illegal. If it were, every security camera would be illegal. Get several recordings from all angles.
Rufus T. Firefly
Of course you can. But if what you say is true that she is crazy and (heavily hoping we will assume) YOU are NOT crazy, you'll record her discretely. If you're also crazy, you'll make sure she sees you recording her, because deep down a crazy person will know this will provoke a fight. Not crazy: Film out of sight. Crazy too: Walk right out holding up your camera and you can both be on YT humiliating yourselves. By the way, if you are just mental health shaming, then really, shame on you. If she's just angry, then stay out of if. You don't know how your brother provoked her. If she IS sincerely crazy, you'll keep it discrete and not be tempted to provoke her or post it online. She needs help, not public tar and feathers. And figure out what's wrong with your brother that he dated a real crazy person. (No. No... crazy people don't hide it for a long time and SUDDENLY be crazy.)
laughter_every_day
No. What you do with that recording is quite another question. Every time you walk by an ATM or into a bank, or into store, your image is being recorded. Likewise, when the network films the crowd at at a football game, they do not need the permission of everyone in the stands.
Pascal the Gambler
Not in a public place, or on your property.
Ben
Of course not, but you should follow some ethics if the other person wants to have his/her picture taken. If they say "no thanks", then respect that.