Many Australians have strangers on their Facebook friends' list where they really do not know all the people in it, reveals a new study.

Abi Caust, 25, from Colonel Light Gardens, has 738 Facebook friends but knows less than half.
"There are people I went to primary school with, old school friends, there's people I have met through work and people from overseas I haven't met but added for Facebook games," she said.
Caust does not know many of her "friends", which is why she keeps her Facebook on a "very high privacy setting".
"Only my close friends can see my whole profile," she said.
Social media intelligence company SR7 co-founder Peter Fraser asserted that the numbers indicated Australians are using the technology to stay in touch with people globally in place of mail and phone conversations.
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Source-ANI