As I bystander, I expect them to never record my voice since it's against my express wishes. Only one of us ever gets what he wants. Doesn't seem fair.
In a public place I expect some level of privacy intrusions. CCTV cameras aren't so bad in public as long as the recordings are only stored for a few weeks and the data is not analyised unless there is reason to believe it contains evidence.
For example its acceptable to access the video to prove someone stole from your store but it is not acceptable to use facial recognition on your cctv to see who your best customers are.
