friend or stranger

How do you think of this difference between friend and stranger?
for example, would like to talk here,
one thing, you think it's nice, not only the quality but also the price, then you share with cheap nfl hats,
even who just know each other, did never meet before,
meanwhile, in order to show politeness, show sorry at the same time,
however, there is someone who thought you are from ***purpose, don't know how to describe,
the words express so unfriendly facing with so many eyes, no words, unhappy to meet cheap oakley sunglasses,
what's more, he said that if need, will go to the internet,
oh is there any difference?
if you don't think so, how to require others, why you show your idea by all others based on your own opinion,
there is really nothing, why so serious, why not being relaxable,
which recalled me those part-time wechater in cheap mlb jerseys business,
when they paste those goods in space, they hide it and even thought it's fake or else,
actually you still need to buy those stuff, why not buy cheap nba jerseys from your friends, but from the net,
is there any difference?
if same price, same quality, why not show such indifference?
show your friendness to the stranger, even you wonder on the street, still can't help smiling to them,
why keep cool around your friends to face with such issue,
it's the familiar stranger?