Look at the face of any person. Face tells everything.
If he looks like an animal, he is gonna soon become
one when there is a confrontation with you. If he
looks very sad and ultra-reasonable, he is still bad,
because there is no need to be sad, he is also
unbalanced. The one who doesnt want anything and
is detached is correct, because he puts a distance
to first see any situation before he connects.
Before you go inside any store, any building,
look at the face/s of people inside. Avoid problems
this way. A trustworthy person is one who has
talked to you, and understood you, but you have
to let everyone have his / her space and not go
in any expectation. Self Preservation.