Believe in Unknown Person

Should you believe in unknown person.
what do you think,,
when unknown person meets ,
On social networking sites and other sites,,
what do you do and what do you think ,
Should you believe in unknown person,,
I do not believe in unknown person,
before believing I check his/her public profile/public images,,
On social networking sites and other sites,
Then i make him/her my friend,,
I use this way to make a unknown person my friend,
do you do like me if you do not do,,
you should do like me,
because believing in unknown person is not well sometimes,,
should you believe in unknown person,
what do you think,,
when unknown person meets,
On social networking sites and other sites,,

(kisee pe is taraha vharosha na karna karna hi ho to dil se mashvira karna or dimag ka istmal karna tab jaake kisee pe vishwas karna,,,,,)