i also heard about it and it is really not safe to store your personal particulars and it is not safe to use Facebook is my point of view and soon i will try to delete my account.
We need to be cautious on all sites. We must not express what we wish to be secret. Financial details should not be given. The personal views including religious, sexual traits etc should be expressed only if you are not strict about secrecy. Personally, I am not bothered about privacy. Let everyone know the facts and views that I hold. There is nothing secret.