They like to put it into our heads that the way we react to them has any bearing on how they will treat us in the future. It doesn't. It's all designed to mess with you and make you paranoid of your own behavior, so just as long as you aren't violent or destructive, don't worry about how you react because they are going to be there anyway. It's a big theater show and you're the mind game target. I'd even go so far as to say not to worry about acting strange. I know that is an unpopular opinion around here, as some people say not to react at all, but again, it doesn't really matter what you do.
Think back to before you were targeted. Were you inhibited, or were you more carefree? If you were inhibited, do you think you could have been more carefree? If you were carefree, did people look at you funny? Did it even matter? Probably not as much as you think. There is no reason to be afraid in this regard. They are there to mess with you and will imply that your heart rate speeds up around them, or that you get warm, or that you are acting cool to play it off. Mirroring you is a big one. This immediately makes you fell self-conscious. They'll do anything to make you paranoid and question your actions. It's all bullshit