There are some skills taught in that realm. From personal experience, I have learned to recognize trouble by gait and eyes alone. I get that people get different experiences, but I could have done without that knowledge.
I remember one politician once responding in an off-hand manner as to why they are focusing on prisons and not day cares, to which he responded: 'well, there is still a change I may end up in prison'. Naturally, I did not realize then how optimistic that remark was.
