2. I think that the reason for the chilukei deios has to do with the fact that different people are understanding the situation differently. Ok, maybe that’s obvious. But my point is that I think that some people, when they hear the word, “shrieking” ,it sets off major warning bells and they assume that there is immediate and clear danger or at least a very strong possibility of such.
“Shrieking” can mean different things. The word itself is open to interpretation. It does not necessarily mean a situation that necessitates police intervention
The OP wrote (a few times) that he is not sure that something is going on. He is not sure if this case necessitates police intervention. His Rav is sure that this case does not. They are the only two people here who have any information. None of the posters here do. All we know is that an anonymous poster is nervous and his Rav is sure that police intervention is not needed. Yes, his Rav could be wrong, and yes, we have no idea who his Rav is. But why assume that his Rav is wrong and that the police should be called? No one here knows anything about the situation; how can anyone possibly be poskening that he should call the police?
This is a situation that calls for a psak halacha from someone who knows more about the situation than anyone here possibly can. No one here has any right to posken that he is allowed to call the police. The most you can do is to tell him to ask someone else. However, even that only makes sense if the second person is more authoritative than the first and if he tells him that he spoke to his Rav and what his Rav said.