You can ask your friends who have got facebook to report the profile, but they may not act on it
The following is taken from facebook with regards to imposters
"If someone has created an account to impersonate or imitate you, please go to the impostor profile and click "Report/block this person" at the bottom of the left column. Check the "Report this Person" box, choose "Fake Profile" as the reason, and add "Impersonating me or someone else" as the report type. Be sure to add a valid web address (URL) leading to the real profile so that we can review the information."
(incidentally. how did somebody else post information that only you know, surely the fact they have posted it means it's not only you that knows it?)