Why do birds keep staring at the same person and shit on this person?

That's a good question My personal experience, when I was growing up in the countryside, I especially liked digging bird's nest. It is said that once we dug a crow's nest, and then we had the following plot. I haven't climbed to the crow's nest yet. The crow came back, barked at us and sprayed something at me. This thing may be feces or food brought back by crows. In the next few days, I went to school through the forest, and crows sprayed me every day after school. It's been almost a week. I guess what you said may belong to the violation of birds, and then birds fight with people.