How to Say no to cameras?

Good people of kochi. If you are someone you don't appreciate your pics/videos taken without consent even when we are in the foreground or background of their frame, you would understand my concern. I get super uncomfortable when people take pictures and videos especially when we are in public places like restaurants and cafes. While they are just capturing the 'aesthetics' of the place, the faces of everyone around gets captured. I find this culture more in Kochi. Where genzs snap everything they see and everywhere they go and so called youtubers and vloggers approach us impromptu with their cameras with no respect to peoples privacy. I am someone who still wear mask when I go out for this reason. But it's not possible when we dine in a restaurant or a cafe. Anyone else feel this as an issue.