What do you think of people who are hostile to strangers while being friendly to their own friends?

Anonymous
Since there are people who are easily suspicious and puts a serious face (no smiling) towards strangers and talks in a straightforward mind, what do you think of people who are not being warm and being direct. Like for example :
"Who are you?"
"What do you want?"
"Do I know you?"
Etc.
No Hi, How Are You, Nice Meetin' ya, etc. None.
If you met a guy or a girl who are like this, what do you think personally of these kind people who are hostile to others?
What do you think of people who are hostile to strangers while being friendly to their own friends?
3 Opinion