Yes it is. It's how journalism works -- including paparazzi journalism.
Have you studied the subject? I doubt it, so please stop. Paparazzi usually focus on public figures like actors, which don't have the same rights over their own image, since they have voluntarily exposed themselves to the public.
Everyone in a public area voluntarily exposes themselves to the public. Your images in public spaces are legal to record. If you disagree, try suing a security camera operator.
Clearly you don't know the law, and what's even worse your logic is broken. I give up.