I am also hypervigilant. It's a two-edged sword. It has both saved my life and ruined it in ways. I don't feel that it should be eradicated as it can be a great self-defense mechanism. The best thing to do is to learn to control it as best as possible. I do this through exposure "therapy" (I don't go to therapy), but I force myself to go into uncomfortable situations and while in those situations I focus on relaxing as much as possible or focusing on good aspects of the situation. For example: I'm a teacher, people make me very nervous, especially the new students I get. I focus my hypervigilance on getting to know the new students and learning what makes them tick. After a few classes, I am no longer so uptight and worried about them and in many cases enjoy their company. I've met a quite a few students that are not only students but also teachers and friends. You always have to remember that there are other people who are similar. Find relatable things and try not to look for the things you can't relate to and so on.
Another good thing to do is to train in some form of martial art, learn to protect yourself if necessary. If you do this you'll feel more confident and less worried about people doing you physical harm. It's the mental harm that some always seem to be capable of inflicting.
In this day and age it's not very hard to be on edge and to let your fears overcome you.
I hope this helps and I truly feel for you.
Thank you very much, for your kind sentiments and useful suggestions. I've been pondering what you mentioned, regarding exposure therapy, and wonder if it is similar to what I have been attempting, by writing on the forum, and refraining from deleting my posts, which I tend to do, as the result of anxiety/OCD/ social anxiety.
I like the idea of martial arts, and will look into it. I don't have fear of physical harm, per se, but, I think, as you mentioned, it can help develop self-confidence, of which I have been lacking. You had also mentioned yoga, of which I had practiced in past, and have, recently, taken up, again. Yoga had helped me in multiple ways, particularly, with regard to anxiety and other symptoms of ptsd. Thank you, again, for everything.
edited: I think you are right, with regard to the positive aspect of hypervigilannce. It has definitely saved me in various situations, as well. I think it does come down to, acquiring a balance and the ability to control it in some way. I haven't acquired that, yet, but, I am hopeful. I also wanted to wish you all the best with the situations you mentioned, you contend with.