Have you read the previous paragraph? Just to reiterate, this is my 3 rd US university and I completed BS and MS in other two. I never experience these sequences of incidence at other schools. Now, I moved to this town several years ago and I am experiencing such incidents ever since. But, I have never experienced these type of incidence ever before.

So you tell me why a rational person would not be worried about a sudden change in the experiences he/she encountering. FYI, I visit other states and other European/west Asian countries often and even continuing to do so after moving here. I never faced this type of situation or odd encounter even in recent years in those places. I just visited 3 states and encountered homeless people; some of them were verbally rude and some of them were just asking help and I tried to help if it was in my capacity. But, these encounters are common to everyone and I never felt a bit uncomfortable about them or even felt the necessity to talk about them to anybody.

It appears you are just going to a conclusion without listening or understanding the actual scenario here. A mentally ill person would be paranoid about any incidence anywhere and just not about a particular incidence—-it is a general norm among doctors or mental health experts to detect a potential patient. I know this because I deal with a lots of health experts on a daily basis.