My Mom and Dad taught me never to talk to strangers, so I don't.  Unless of course I have some kind of business to conduct with them...IE: banking, ordering food or through my work.

But if you value you life you don't just walk up to random strangers and chat them up.  They'll either think you're nuts, or about to mug them. And in the later event, you could end up stabbed or shot!

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi