You can't have an expectation of privacy in public places.
Facial recognition can be beat by a hat + sunglasses (which is the hugest plot hole in Person of Interest, the characters never even attempt to disguise themselves).
If you followed PoI closely enough (if you did not: spoiler alert!), the main characters do not have to disguise themselves from Samaritan because they snuck in a patch that literally makes Samaritan blind when it sees them. For one reason or another, Samaritan or its accomplices can not locate and remove that patch. That, of course, does not prevent Samaritan from figuring out where they are by other means (like tracking their actions, accomplices, vehicles, etc.) and from Samaritan agents to see them in plain old ways. But by the time a team of dozen commandos comes in guns blazing, it's too late to get the hat on. They would probably disregard the hat.
You don't have to. But throwing a tantrum isn't going to change reality. We have the laws allowing anybody to film anything visible from public places, with a few security exceptions. That's more important than you getting upset that you are not invisible.
To address your point on Person of Interest (an absolutely wonderful series, recommended to the entire HN audience): There's several instances where the main characters disguise themselves. But it's not practical for general purpose - There is more than facial recognition at play - voice recognition, process of elimination etc and there is no trouble tracking already-identified targets.
You can be identified by body shape and gait. If you've ever been through airport security, a 3D model of your body has been captured. If you have a smartphone, your gait can be recorded.
In Cory Doctorow's book Little Brother, the protagonist defeats gait sensors with some pebbles in his shoe. It's really not such a bad idea, as every step is going to be different as your foot tries not to hit the pebble too hard.
Facial recognition can be beat by a hat + sunglasses (which is the hugest plot hole in Person of Interest, the characters never even attempt to disguise themselves).